Because there was no previous history of hemophilia in Queen Victoria's family, and because she transmitted the mutant allele to a number of her children, it is reasonable to assume that ____

a. her father was homozygous for the disorder
b. her mother was homozygous for the disorder
c. her sister was a heterozygous carrier
d. she was homozygous for the disorder
e. she was a heterozygous carrier


e

Biology & Microbiology

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How does the protein Sic1 regulate the cell cycle?

a. Sic1 is a cyclin that binds to a Cdk to form a cyclin/Cdk complex, which regulates the G1 to S transition. b. Sic1 inhibits an S phase cyclin/CDK complex required for synthesis to occur c. Sic1 binds to a cyclin, to form a complex that regulates the G2 to M transition. d. Sic1 is a growth factor that binds to external receptors and promotes the transition from G1 to S. e. Sic1 is a cyclin that binds to a Cdk to form a cyclin/Cdk complex to regulate the G2 to M transition.

Biology & Microbiology

The sipunculid worms are also called:

a. peanut worms. b. lugworms. c. innkeeper worms. d. fanworms. e. beardworms.

Biology & Microbiology

Four of the five choices listed below can be used to

describe fungal life. Select the exception. a. heterotrophic b. saprobic c. parasitic d. decomposer e. autotrophic

Biology & Microbiology

Blood calcium level is regulated in part by _________ a hormone secreted by the thyroid gland when the blood calcium level rises.

A) serotonin. B) parathyroid. C) calcitonin. D) estrogen.

Biology & Microbiology