Directional selection would be expected to occur if

A. a new allele arises by mutation that increases fitness.
B. the environment changes.
C. the population is large.
D. a new allele arises by mutation that increases fitness and the environmental changes increase the allele frequency.
E. a new allele arises by mutation that increases fitness, the environment changes and the population is large are correct.


D. a new allele arises by mutation that increases fitness and the environmental changes increase the allele frequency.

Biology & Microbiology

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If the wild type DNA sequence reads THE CAT ATE THE BIG RAT, what type of mutation would change the sequence to THE CAT ATE THE BAG RAT?

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The longest portion of the large intestine region is known as the _____________.

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With __________, offspring inherit the same number and kinds of genes from one parent.

Fill in the blank(s) with the appropriate word(s).

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