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givi [52]
2 years ago
7

after many cell division a segment of DNA has more base pairs then it originally did explain what has happened

Biology
1 answer:
Allisa [31]2 years ago
3 0
<span><em>DNA synthesis occurs just prior to cell division through a process called replication. When replication begins the two strands of DNA are separated by a variety of enzymes. Prior to cell division, the DNA material in the original cell must be duplicated so that after cell division, each new cell contains the full amount of DNA material.</em></span>
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In humans, a type of blindness is due to a dominant allele; normal vision is the result of a recessive allele. Migraine headache
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Answer:

Yes.

Probability of such child = 1/2 or 50%

Explanation:

According to the question, below are the genotypes and phenotypes possibilities:

aa = normal vision & no headache

Aa = normal vision & no headache

AA = blindness & headache

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                                                                        Aa                            aa

Possible genotypes of progeny:            Aa        Aa           aa         aa

So it is clear that out of the 4 probable children, 2 with 'genotype aa' will have normal vision & no headache.

Mathematical expression is as under:

2/4 = 1/2 that means 50% progeny.

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D. All of the above
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