Genetics study guide In a population of wildflowers, the frequency of the domina

Question

Genetics study guide In a population of wildflowers, the frequency of the dominant allele for red flowers is 0.8. What is the frequency of homozygous, white- flowering plants in the population? When a structural gene is under negative inducible control, what would be the result of a mutation that eliminates the repressor protein? There is a mutation in the operator Gene Cis a mutation in the operator or Gene c that allows an activator to bind to it. Which of the following is true regarding the regulation of gene C? A mutation in the gene for the yeast regulatory protein GALA causes yeast to grow poorly on galactose, a type of sugar what is the function of GALA? Why is it possible for a repressor to negatively regulate the expression of an operon?

Explanation / Answer

Question 30

ACCORDING HARDY -WEINBERYG

P=DOMINANT—RED ------ ALLELE FREQUENCY = 0.8

Q= RECESSIVE –WHITE -------ALLELE FREQUENCY = 1-P=1- 0.8 =0.2

P^2== 0.8 X= 0.8 =0.64

2PQ=2X 0.8 X= 0.2 =0.32

Q^2= 0.2 X= 0.2=0.04=====================ANSWER

HOMOZYGOUS WHITE FLOWERS =4%

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