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Lera25 [3.4K]
3 years ago
7

A biologist marked a cell that he knew was about to undergo meiosis. A short time later he observed the four cells produced by t

he original marked cell, their chromosome numbers were 17, 17, 18, 16. He knew these numbers indicate that something abnormal had occurred during meiosis.
Biology
1 answer:
melomori [17]3 years ago
8 0

Answer:

NON DISJUNCTION: when 2 homologous chromosomes move to the same pole during meiosis. One daughter cell will be missing one chromosome while the other will have an extra chromosome.

Explanation:

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Will mark brainliest!!!!
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That's intimidating, lol!

Okay so choice A says that #8 is heterozygous for the trait which means for example it would have the genotype Aa. She's a female witht he dominant trait. This is a possibility.

Choice B says #10 is heterozygous, but if it has the recessive trait it would have to have the geotype aa which is homozygous so this one is wrong.

Choice C says #13 is homozygous dominant which means the genotype will be AA. The individual can still have the dominant trait without having the AA genotype (it can also be Aa) so this one is wrong.

Choice D says that #3 is homozygous dominant but like with choice C, the chart doesn't specify the genotypes of each so it'd be a guess to say that #3 is homozygous. This is wrong.

This means that choice A is true!

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