RNA synthesis

RNA synthesis

Hypophosphatemia (vitamin D-resistant rickets) is inherited as a sex-linked dominant trait. The relevant gene is found on the X chromosome. What is the expected outcome of a cross between a homozygous recessive woman and a man with hypophosphatemia?

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All of their daughters and none of their sons exhibit hypophosphatemia.

Fifty percent of their daughters and fifty percent of their sons exhibit hypophosphatemia.

All of their sons and none of their daughters exhibit hypophosphatemia.

Twenty-five percent of their offspring exhibit hypophosphatemia.

Question 2 2.5 / 2.5 points

In humans, the presence or absence of dimples is a trait controlled by a single gene. What is the genotype of an individual who is heterozygous for dimples?

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Question 3 2.5 / 2.5 points

Which of these techniques could tell you how gene expression differs between individuals with and without cystic fibrosis?

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Therapeutic cloning

DNA microarray

Reproductive cloning


Question 4 2.5 / 2.5 points

Which of these is most likely to cause the development of a six-legged frog?

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Mutation of homeotic genes

Artificial selection

Dietary supplementation

Conversion of a proto-oncogene to an oncogene

Question 5 2.5 / 2.5 points

Which of the following turns off transcription by binding to the operator?

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RNA polymerase




Question 6 2.5 / 2.5 points

The region of DNA where RNA synthesis begins is the:

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start codon.




Question 7 2.5 / 2.5 points

The absence of a terminator in transcription will result in:

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the creation of a virus.

a strand of mRNA that lacks its cap and tail.

the production of a longer RNA molecule.

the production of a shorter RNA molecule.

Question 8 2.5 / 2.5 points

Which of the following enzymes is responsible for RNA synthesis?

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