A couple has 5 children, all sons. If the women gives birth to a sixth child, what is the probability that the sixth child will be a son?
A. 5/6
B. 1/2
C. 1/5
D. 1/6
E. 1/64
Ans: B. 1/2
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Fragile X syndrome is caused by a(n)
A) deletion. B) translocation. C) expanding triplet repeat. D) point mutation.
The deuterostomes are animals whose
a. stomach is in front of the crop. b. mouth is covered by a fleshy lip. c. blastopore becomes the anus. d. digestive tract is lined by mesoderm.
Which is an accurate statement regarding the structure of a neuron?
a. Dendrites carry impulses away from the cell body. b. Nodes of Ranvier are gaps between myelinated axon segments. c. Nerve impulses travel along the axon toward the cell body. d. Dendrites are often myelinated for faster conduction. e. Myelin is a fatty material produced and secreted by the axon.
How can analysis of mammalian genomes be used to detect and treat human disease? Check all that apply.
A. A comparison of mouse and human genomes would help reveal functions for previously unidentified human genes. B. Comparing the genomes of parasite and host is likely to reveal good drug targets to eliminate the parasite without harming the host. C. A comparison of human and mouse genomes would help observe DNA sequences that evolved prior to the evolution of mammals. D. The genomes of the mammalian relatives of humans are the best targets for discovering new treatments for human diseases.