If a species has 42 pairs of chromosomes, how many maternal and paternal chromosome combinations are possible
during independent assortment?
a. 422
b. 242
c. 221
d. 212
e. 842
ANSWER: b
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During spring time in Maine, male moose often enter a cow pasture and begin calling to the female cows. The moose may even try to mount the female but the male genitalia do not fit properly inside the female genitalia. This is an example of
A. mechanical isolation. B. temporal isolation. C. habitat isolation. D. behavioral isolation. E. gametic isolation.
The ____ of an earthworm allows them to resist desiccation in terrestrial environments
a. shell b. cuticle c. mesoglea d. epidermis e. endodermis
As you move south from the equator to the south pole, animal and plant diversity
A) increase. B) decrease. C) are not affected by latitudinal changes
Crossing over occurs during which stage of meiosis?
A) telophase I B) metaphase II C) prophase I D) anaphase II E) prophase II