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KiRa [710]
3 years ago
13

which of the following best describes a frameshift mutation. A. When a segment of nitrogen bases gets added into a strand of DNA

. B. When a segment of nitrogen bases gets removed from a strand of DNA. C. When a segment of a chromosome gets removed. D. Both A and B.​
Biology
1 answer:
Kaylis [27]3 years ago
8 0
D. Both A and B

Hope this helps! :)
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Let's assume that the allele "p" is responsible for PKU in the homozygous state. According to the given information, both the parents are unaffected by the disorder but have an affected child. This means that both the parents carry at least one copy of the recessive allele responsible for the disease. Therefore, the genotype of each of the parents is Pp. A cross between Pp and Pp would produce progeny in following ratio=

Pp x Pp = 1/4 PP: 1/2/ Pp: 1/4 pp

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