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lubasha [3.4K]
3 years ago
13

URGENT!! Describe nondisjunction and the effect it can have on a human.

Biology
2 answers:
Bad White [126]3 years ago
8 0

Meiosis is a type of cell division by which chromosome number is reduced to half. It occurs during gamete formation. However, during anaphase I, a pair of chromosome fails to separate or during anaphase II sister chromatids fail to separate during anaphase II of meiosis. Both the cases results into nondisjunction of chromosomes. Nondisjunction forms abnormal number of chromosomes in the gametes.  

Nondisjunction causes human disorders in autosomes from chromosomes 1-22. The examples are Down syndrome or trisomy 21, an extra copy of chromosome 21. People with Down syndrome have 47 chromosome instead 46.  

Vlada [557]3 years ago
6 0
Nondisjunction<span> in meiosis, occurs during anaphase. When one pair of homologous chromosomes fails to separate. This effects age development and genetic recombination for humans. </span>
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3 years ago
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4 years ago
Read 2 more answers
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Vsevolod [243]

Answer:

If you did not follow the procedure as you should have.

Explanation:

You may have to repeat an experiment for several reasons. It can be because you need to be certain of the results so that you have to perform it several times. Or you need more precise results so that you can fine-tune the variables and repeat the experiment again.

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I hope this answer helps.

3 0
3 years ago
In complete sentences describe the flow of energy from the sun to a producer, then to a consumer. Please help!
Darina [25.2K]
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3 years ago
Identify the genotype of the hornless cow at the top of the pedigree. Use H for hornless and h for
amm1812

Answer:

If you do the punnet square, This is would you could get, and this could determine whether the cow would be hornless or horned. In this case hornless because it is the donminint trait as well. (H)

Explanation:

           h       h

H         Hh      Hh

H         Hh      Hh

4 0
3 years ago
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