What caused the chromosomal alteration in the number 21 chromosomes? (LS3.2) A. Part of one chromosome attached to another chromosome B. Some of the genes on a chromosome were reversed C. A duplicated chromosome failed to separate during meiosis D. A part of a chromosome was lost

Answers

Answer 1

Answer:

The correct answr is - A. Part of one chromosome attached to another chromosome.

Explanation:

Translocation is one of the chromosome abnormality that cause change in the number of the chromosome. In the translocation a part of the chromosome breaks off and bind or attached to the another chromosome.

The translocation cause various disorderes in individual one of them is Down syndrome which is the result of the alteration of chromosome number 21. In this translocation or specicifically the chromosome portion of chroromosme 14 breaks off and reattaches to the chromosome 21 result in one normal 14 and two normal 21 chromosme so there is trisomy occurs.

Answer 2

Answer:

A duplicated chromosome failed to separate (nondisjunction)

Explanation:

If nondisjunction occurs during meiosis I, homologous chromosomes fail to separate. This produces abnormal gametes that contain two members of the affected chromosome or none. This is why there is an extra chromosome in the 21 chromosomes.


Related Questions

Is baking soda organic or inorganic explain why?

Answers

Answer:

Inorganic

Explanation:

Baking soda can be found as a naturally occurring compound, but is more frequently manufactured from other naturally derived materials, like trona ore. Baking soda can be produced by the reaction of carbon dioxide and soda ash, a naturally occurring mineral. To my knowledge there is not an “organic” baking soda.

1. Describe the process of photosynthesis using the reaction for photosynthesis

2. What are the two sets of reactions of photosynthesis studied in class?

3. Which reactants and which products enter and are produced in which one of the
two sets of reactions?

4. What is NADPH, what is its function and what is actually carrying?​

please I need help it due at 2:00
asap plz

Answers

Answer:

1. if you are talking about the formula its this: 6CO2 + 6H2O → C6H12O6 + 6O2

2. the light-dependent reactions and the Calvin cycle.

3.  The photosynthesis chemical equation states that the reactants (carbon dioxide, water, and sunlight), yield two products, glucose, and oxygen gas.

4. As in other reactions, NADPH helps carry electrons and protons driven by sunlight into new carbon-carbon bonds, creating sugar molecules. NADPH is often kept at a higher concentration in the cytosol than NADP+, to allow for the easy reduction of small molecules into larger macromolecules.

Explanation:

I really hope this helps:)

5. What are the building blocks of lipids?
A) Nucleic acids
B) Triglycerides
C) Amino acids
D) Glucose

Answers

Answer:

Its A

Explanation:

Nucleic acid

The answer to this question is A. Nucleic Acids

Which statement best describes enzymes?

A) They slow down the rate of breathing.
B) They are the building blocks of polymers.
C) They speed up the conduction of impulses along a nerve cell.
D) They influence the rate of chemical reactions.

Answers

Answer is D. Enzymes are a catalyst that speed up the rate of Rx

what is an energy transformation?​

Answers

Answer: Energy transformation is the process of changing energy from one form to another.

Explanation: Remember that energy cannot be created nor destroyed but it can be transferred or changed from one form to another. For example, chemical to mechanical or electrical to thermal.

What are common changes
In an environment?

Answers

Answer:shelter, land, prey

Explanation:

Changes? Do you mean like temperature and humidity

a cell is placed in a isotonic solution. How does the cell maintain homeostasis in the environment ?

Answers

Answer:

If a cell is placed in an isotonic solution, there will be no net flow of water into or out of the cell, and the cell's volume will remain stable. If the solute concentration outside the cell is the same as inside the cell, and the solutes cannot cross the membrane, then that solution is isotonic to the cell.

Explanation:

21. The compound C3H5(C17H3502)3
is a carbohydrate with 40 hydrogen atoms
is a lipid with 40 hydrogen atoms
is a carbohydrate with 110 hydrogen atoms
is a lipid with 110 hydrogen atoms

Answers

Answer:

I kinda need points but I'll help u it might be the second one though

Which of the following statements explains why plants are essential to the carbon cycle?

Answers

Answer:

Plants absorb carbon dioxide, water and sunlight to make their own food, grow and release oxygen through photosynthesis. They're a huge part in keeping our air clean.

Explanation:

Hope this helps.

What is the sequence of the complementary strand for the DNA shown above?


hurry please

Answers

Answer:

either of the two chains that make up a double helix of DNA, with corresponding positions on the two chains being composed of a pair of complementary bases. a section of one nucleic acid chain that is bonded to another by a sequence of base pairs.

how does the nervous system help the excretory system maintain homeostasis?

Answers

Answer:

The nervous system maintains homeostasis by controlling and regulating the other parts of the body. A deviation from a normal set point acts as a stimulus to a receptor, which sends nerve impulses to a regulating center in the brain.

Explanation:

The nervous system keeps the body in a state of homeostasis by controlling and regulating excretory system.

What is Homeostasis?In a broad sense, homeostasis refers to a system's stability or balance. It's the body's endeavor to keep its internal environment consistent. Internal environment stability necessitates regular monitoring and modifications as conditions change. Homeostatic control refers to the balancing of physiological systems within the body.

How does nervous system regulates homeostasis?Because the nervous system does not store nutrients, it must get them from the bloodstream on a regular basis. Any disruption in blood flow might result in brain injury or death.The nervous system keeps the body in a state of homeostasis by controlling and regulating the other organs. A variation from a regular set point stimulates a receptor, which transmits nerve impulses to a brain regulating area.

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10. How does a right angle (90°) alignment between Earth, the Sun, and the Moon influence the tides on Earth?
a. It produces the greatest change in high and low tides.
b. It produces the least change in high and low tides.
c. It produces semidiurnal tides.
d. It produces diurnal tides.

Answers

Answer: The combined gravitational pull of the Sun and moon cause high tides in the path of the alignment, meaning that low tides occur at ninety degrees from the path of the solar eclipse. Due to inertia, the high tides also occur on the opposite side of the Earth from the solar eclipse.

Explanation: it's a

What are the roles nucleic acid plays on living system?​

Answers

Answer:

The functions of nucleic acids have to do with the storage and expression of genetic information. Deoxyribonucleic acid (DNA) encodes the information the cell needs to make proteins. A related type of nucleic acid, called ribonucleic acid (RNA), comes in different molecular forms that participate in protein synthesis.

Explanation:

Why did Robert Hooke choose the name of the tiny chambers that he saw in his microscope?

Answers

Answer:

cell

Explanation:

Robert Hooke named the tiny chambers that he saw in his microscope cells

Make him/her brainliest please. (I answered for him/her to be brainliest.)

List four characteristics of plants.

Answers

Answer:

1. Plants produce their own food.

2. Plant cells have a cell wall.

3. Plants reproduce with spores and sex cells.

4. Plants have a vascular system.

Explanation:

Here is four characteristics plants have.

Plants produce food through photosynthesis so I included that here.

Hope this is correct, have a great day.

HELP WILL GIVE BRAINIEST AND 20 POINTS!!! MY HOT TOPIC ASSIGNMENT IS ABOUT KAMALA HARRIS BECOMING THE FIRST FEMALE, FIRST BLCK AND FIRST SOUTH ASIAN PRESIDENT ELECT. PLEASE GIVE ME 5 QUESTIONS I CAN ASK MY CLASSMATES IT HAS BE RLLY GOOD ONES/ DEEP THINKING ONES REGARDING THE TOPIC I CHOSE. FOR EXAMPLE, DO YOU THINK KAMALA HARRIS BECOMING VICE PRESIDENT WAS A GOOD THING FOR AMERICA? DONT ANSWER IT PLS JUST GIVE QUESTIONS LIKE THAT OR BETTER ONES.

Answers

Answer:

What changes do you think she will make that will help the country

Answer:

1) Would your focus be improving the Affordable Care Act or replacing it with single payer?

2) Do you think it’s possible for the next president to stop climate change?

3) Do you think Israel meets international standards of human rights?

4) Do you think illegal immigration is a major problem in the United States?  

5) Would there be American troops in Afghanistan at the end of your first term?  

Explanation:

Hope this helps! :)

Chemicals and proteins in the cell read the DNA ___________ for building that make cells, tissue and organs.
(A.Instructions
(B.Genes
(C.Recipe
(D. Life manual

Answers

You answer will be B!! Good luckkk!

Genes of DNA can be read by chemicals and proteins for building that can make cells, tissue, and organs. Therefore, option "B" is correct.

What are genes?

Genes are composed of  DNA which is the genetic material. Gene is the functional unit of heredity. Chromosomes are comprised of multiple genes. Genes code for a particular trait. More than one gene can code for a particular trait.

The function of DNA and RNA is controlled by genes. There are more than 3000 genes present. Mutation can occur in genes. Deletion and insertion are some types of mutation genes. Transposomes are called jumping genes. Sickle cell anemia and cystic fibrosis are some examples of gene mutations.

Genes code for the traits such as the color of eyes, height quality of hair, and more.

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ASAP!!!!!!! I NEED HELP
Why are there two sets of phases during meiosis, but only one during mitosis? Think about what is different about meiosis and mitosis


Answer correctly or I will report

Answers

Answer:

Cells undergoing mitosis just divide once because they are forming two new genetically identical cells where as in meiosis cells require two sets of divisions because they need to make the cell a haploid cell which only has half of the total number of chromosomes.

Explanation:

When does
transcription
happen?

Answers

Answer:

Transcription begins when RNA polymerase binds to a promoter sequence near the beginning of a gene (directly or through helper proteins). RNA polymerase uses one of the DNA strands (the template strand) as a template to make a new, complementary RNA molecule. Transcription ends in a process called termination.

Explanation:

Transcription Initiation. The first step in transcription is initiation, when the RNA pol binds to the DNA upstream (5′) of the gene at a specialized sequence called a promoter (Figure 2a). In bacteria, promoters are usually composed of three sequence elements, whereas in eukaryotes, there are as many as seven elements ...

when RNA polymerase binds to a promoter sequence near the beginning of a gene

Long chains of amino acids are called?
Proteins
Fats
Lipids
Carbohydrates

Answers

Answer:

Proteins are long chains of amino acids

Explanation:

Proteins are long chains of amino acids

a device that is held in your hand to transmit and recieve verbal communication is called

Answers

Answer:

radio maybe?? could also be cellphone lol

Explanation:

Which body made up of water is part of the cryosphere?
O A. A glacier
O B. A raindrop
C. A river
D. A lake

Answers

it would be a glacier. The cyro sphere is is the frozen water part of the Earth system

Answer:

A

Explanation:


For each codon, find the correct tRNA anticodon and drag it to the ribosome. Start with the AUG codon
in the ribosome. Find and drag its match, the UAC anticodon, to it. Also, record this pair and the
associated amino acid, Met, to complete the first row of the data table.
PLEASE HELP I DONT KNOW HOW TO DO THIS AT ALL

Answers

So A matches with U and C matches
With G. If you need more
Help then go to comments

Drag the correct tRNA anticodon into the ribosome. Therefore, A matches U and C matches G.

What is the UAC anticodon?

The Ribosome Workbench uses the AUG codon as a universal signal to initiate translation. Because the methionine-bound tRNA has the anticodon sequence UAC, the AUG start codon signals the ribosome to insert into the amino acid methionine.

What is the correct tRNA anticodon for the mRNA codon 5 GGA 3?

1 One codon is 5'-ACG-3'. What is the sequence of tRNA anticodons that bind? Which amino acids does tRNA have? The sequence of the tRNA anticodon is 3'-UGC-5', and the tRNA has the amino acid Thr, the amino acid encoded by the codon.

For more information on UAC anticodon, see

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Hemoglobin is found in red blood cells and carries oxygen from your lungs to the rest of the body. Insulin is a hormone used to regulate blood sugar levels. Since hemoglobin and Insulin are made of chains of amino acids, they are examples of which type of organic molecule?

A. Lipid
B. Protein
C. Carbohydrate
D. Nucleic acid​

Answers

Answer:

B

Explanation:

Proteins are made of chains of amino acids.

What is circulatory system? Name its main organs.

Answers

Answer:

the system that circulates blood and lymph through the body, consisting of the heart, blood vessels, blood, lymph, and the lymphatic vessels and glands.

The circulatory system is composed of the heart and blood vessels, including arteries, veins, and capillaries.

Explanation:

What molecule is C6 H12 06?
ta ble salt
glucose
a protein
carbon dioxide

Answers

Glucose - the chemical formula presented is the chemical formula of glucose

can u answer that question

Answers

Answer:

The synthesis of new proteins

NEED ANSWERS IN 5 MINUTES, PLEASE

List two examples of diffusion in living organisms

Answers

One example of diffusion is something you're probably familiar with, breathing. Oxygen diffuses into your blood when you breathe.

Another example is Osmosis, where plants take up nutrients from the soil and distribute them throughout their system.  

What will happen to the rate of
photosynthesis if a plant stops receiving
water?
A. The rate will increase.
B. The rate will decrease and eventually stop.
C. The rate will be unaffected.

Answers

The answer is B. Not A or C. B. Now go get it right

Answer: B. The rate will decrease and eventually stop.

Explanation:


A certain atom has 26 protons, 26 electrons, and 30 neutrons. Its mass
number is

Answers

Answer:

The mass number is 56

Explanation:

You just add the number of protons and neutrons to find the mass number of a atom.

The answer is 56 hope this helps
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