When an allele's effect on a trait is masked by that of an allele paired with it, the second allele is

referred to as
a. dominant.
b. recessive.
c. codominant.
d. incompletely dominant.
e. hybrid.


B

Biology & Microbiology

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In a small population of cockroaches living in your kitchen, only a few roaches mate in one year.  This can lead to random changes in allele frequency in the population through ______ 

A. nonrandom mating. B. selection. C. genetic drift. D. mutation. E. migration.

Biology & Microbiology

In flowering plants, how many egg cells are typically produced from each megaspore mother cell?

a. one b. two c. three d. four e. eight

Biology & Microbiology

Mutations in genes that affect __________ may cause morphological shifts in a lineage. Fill in the blank(s) with the appropriate word(s)

Biology & Microbiology

When Mendel crossed heterozygotes for flower color and seed color, what proportion of the offspring had both dominant phenotypes?

A) 1/3 B) 3/4 C) 1/16 D) 3/16 E) 9/16

Biology & Microbiology