In polygenic inheritance of skin color, only the dominant alleles contribute to darker skin color.
a. true
b. false
Ans: a. true
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The genetic code is translated in groups of ________ bases.
A. four B. five C. two D. three
The small region of an inactivated X chromosome that is not inactivated contains ____________________
homologous to those on the Y chromosome. Fill in the blank(s) with the appropriate word(s).
During photosynthesis in a leaf, sugars are loaded into the sieve tube by _____ followed by ______ to increase the pressure.
A. osmosis, facilitated diffusion B. facilitated diffusion, osmosis C. gravity, active transport D. active transport, osmosis E. osmosis, gravity
The waggle dance is:
a. used for food location in honeybees. b. used for mate choice in black widow spiders. c. used for kin selection in Belding's ground squirrels. d. used for reciprocal altruism in vampire bats. e. used for mate choice in grebes.