The figure above shows the distribution of pocket-mouse coat colors in several Arizona populations found either on light-colored granite substrate or on dark volcanic rock (dark substrate)

The Melanocortin-1 receptor (Mc1r) alleles, D and d, differ by four amino acids. Mice with DD and Dd genotypes have dark coats, whereas mice with the dd genotype are light colored. What sort of genotype frequencies might you expect to find in the Xmas, Mid, and O'Neill populations?
A) Xmas-high DD frequency; Mid-high Dd frequency, O'Neill-high dd frequency
B) Xmas-high Dd frequency; Mid-high DD frequency, O'Neill-high dd frequency
C) Xmas-high Dd frequency; Mid-high dd frequency, O'Neill-high DD frequency
D) Xmas-high dd frequency; Mid-high Dd frequency, O'Neill-high DD frequency
E) Xmas-high dd frequency; Mid-high DD frequency, O'Neill-high Dd frequency


Answer: E

Biology & Microbiology

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A third gene (T) transfers 45 minutes following the start of conjugation. Based on this information, which of the following is true? A. Genes A and M have a genetic distance of 11 minutes B. Genes A and T have a genetic distance of 19 minutes C. Genes M and t have a genetic distance of 8 minutes D. The order of the genes is A M T E. All of the answers are correct

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A basic difference between self-pollination and cross-pollination is:

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When buds remain attached, they form a chain of yeast cells called

A. mycelium. B. molds. C. septa. D. pseudohyphae. E. dimorphic.

Biology & Microbiology

Homologous genes in different species are called

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