Two genes (B and C) are transcription factors that affect the expression of gene A. The...
Two genes (B and C) are transcription factors that affect the expression of gene A. The protein product of gene B allows gene A to be transcribed while the protein product of gene C doubles the rate of transcription of gene A. How does the expression of gene A differ between two individuals with the following genotypes? Assume lower case alleles produce non-functional proteins and each gene shows complete dominance.
Individual 1: AA : BB : Cc
Individual 2: AA : Bb : cc
Homework Answers
Ans:
The High levels (double rates) of expression of gene A occurs in Individual I because individual I has both dominant alleles B and C (BBCc). So, the protein products of functional gene B and C allow gene A to transcribed at double rate.
The low levels of expression of gene A occurs in individual II because individual II doesn't has functional C gene (cc) products. So, the protein product of functional B gene (Bb) allows gene A to transcribed at low rate.
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a) in embryos that are homozygous for a null mutation in gene
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b) in embryos that are homozygous for a null mutation in gene
C.
c) in embryos that are homozygous for a null mutation in gene
D.
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