Which of these differences in phenotypes could create a prezygotic barrier?
a. dogs too small to carry their offspring to term
b. birds with long beaks instead of short beaks
c. a whale that sings at decibels of 52Hertz (Hz) instead of 40Hz
d. a goat with red hair instead of black hair
c. a whale that sings at decibels of 52Hertz (Hz) instead of 40Hz
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During spermatogenesis in meiosis II, ____ form(s)
a. primary spermatocytes b. secondary spermatocytes c. spermatids d. mature sperm e. a zygote
According to a variety of gene data, which hypothesis is correct?
A. the Multiregional Hypothesis B. the Recently-Out-of-Africa Model C. Both the choices are correct. D. Neither choice is correct.
________ makes it possible to trace phylogenies among microbial groups for which there is no fossil record
A) Convergent evolution B) Using vertebrate outgroups C) Horizontal gene transfer D) Molecular systematics
To test Mendel's Law of Segregation, the experimenter needs ________
A) a minimum of two contrasting forms of a gene B) at least 500 offspring to count C) a DNA sequencing apparatus D) the ability to perform a test cross E) access to several generations of data