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densk [106]
3 years ago
8

HELPPP

Biology
2 answers:
zmey [24]3 years ago
8 0
The answer is the bottom choice! Hope this helped
Juliette [100K]3 years ago
3 0

Answer:tryna play pubg later?

Explanation:

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How is variation introduced into populations of asexual organisms such as bacteria and amoebas?
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Answer:

In asexual reproduction an exact genetic copy of the parent organism is produced. Unlike sexual reproduction, asexual reproduction only introduces genetic variation into the population if a random mutation in the organism's DNA is passed on to the offspring.

Explanation:

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During which of these stages of meiosis do homologous chromosomes form tetrads?
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Which of the following statements is true? A. The daughter cells formed during mitosis are genetically similar to, though not id
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3 years ago
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A woman produces an egg with 24 chromosomes, including 2 copies of chromosome 21. If the egg is fertilized by a normal sperm, th
Zielflug [23.3K]

Answer:

47

Explanation:

We all know that gametes like egg cell and sperm have haploid set of chromosomes but here as per this question she has produced 2 copies of chromosome 21. For the sake of maintaining haploidy, she was supposed to have only a single copy of chromosome 21 as a result of which her egg cell was supposed to have 23 chromosomes not 24.

But, this is a case of non dis-junction. Also, in a normal sperm there are no such copies of any chromosome i.e. there is a haploid set of chromosomes. It means that sperm must be having only 23 chromosomes. So we can easily infer that when the egg cell and sperm will fuse, the zygote will have 47 chromosomes (24 from egg cell and 23 from sperm).  

6 0
3 years ago
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