Why did the lactose tolerance mutation in the East African herders spread so rapidly within the population?
A) Milk provided calcium for strong bones.
B) It was a selective advantage for survival during droughts and cold winters.
C) Lactose was a better source of energy than glucose.
D) Milk was a good source of protein during the summer harvests.
Answer: B
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Weinberg formula? a. It is helpful to doctors and genetic counselors. b. It can predict the carrier frequency of alleles known to cause genetic disorders. c. It can explain why some individuals absorb too much iron from their food. d. The math is useful in research on the effects of a mutant BRCA2 allele. e. It can predict that the frequency of hemochromatosis carriers in Irish populations is 0.24
Gregor Medel performed his famous experiments on
a) hawkweed b) humans c) Darwin's finches d) garden peas e) pigeons
Muscle tissue develops from which germ layer of an embryo?
a) endoderm b) ectoderm c) gastroderm d) mesoderm
Tracheophyte plants are characterized by all of the following except
A. stomata. B. seeds. C. homosporous or heterosporous. D. a specialized water conducting system. E. a waxy cuticle.