Huntington’s disease is a dominant autosomal
genetic disorder. Albert has Huntington’s
disease as did his mother. His father was
normal. Albert is married to Lydia who does
not have Huntington’s disease. If Albert and
Lydia have a child, what is the probability that
their child will have Huntington’s disease?
a. 0%
b. 25%
c. 50%
d. 75%
e. 100%
C
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During which stage of the cell cycle are chromosomes duplicated?
a. mitosis b. S phase c. interphase d. cytokinesis
The mollusks with the largest brain and most complex behavior are the:
a. chitins b. cephalopods c. gastropods d. bivalves e. chelicerates
To control the cell cycle:a
the activity of Cdks stays the same throughout the cell cycle. b. cyclins fluctuate during the cell cycle. c. Cdks are active only when they are released from cyclins. d. the anaphase-promoting complex stimulates DNA replication. e. M-Cdk inhibits mitosis.
The female hormone that participates in milk production is _____ and the hormone that stimulates milk glands to contract is _____.
A. prolactin; oxytocin B. prolactin; estrogen C. prolactin; progesterone D. oxytocin; estrogen E. oxytocin; progesterone