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anygoal [31]
3 years ago
5

In a cross of two heterozygous parents, 25% of the offspring should have the recessive phenotype.

Biology
1 answer:
Degger [83]3 years ago
7 0
True because if you were to do a punnet square, it would show 25% recessive 25% dominate and 75% hybrid 

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Over 1,800 mutations have been described within the CFTR gene. These mutations can be readily detected using PCR and DNA sequenc
sertanlavr [38]

Answer:

The correct answer is - option C.

Explanation:

CFTR is a short form of cystic fibrosis transmembrane conductance regulator protein which is caused by a recessive mutation in this protein. This mutation results in the accumulation of mucus in secretory organs.

As the disease is a recessive disease, for the mutant phenotype to expressed both copies of the allele required to be recessive.

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3 years ago
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2 years ago
ASAP HELP
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