Hawthorn Maggot Flies That Breed on Native Hawthorns and Those

question 24

Multiple Choice

Hawthorn maggot flies that breed on native hawthorns and those that breed on introduced European apples can mate in the lab,but rarely mate in the wild.This is an example of ____ reproductive isolation.

• A)postzygotic
• B)prezygotic
• C)allopatric
• D)sympatric
• E)outgroup

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Definitions:

Additive Genes

Genetic models where the effects of individual genes add up to influence a trait, without dominance between alleles.

Dominant Genes

Genes that express their traits in the phenotype, regardless of the presence of their recessive counterparts in an organism's genotype.

Recessive Genes

Genes that produce their characteristic phenotype only when their allele is identical and not masked by a dominant allele in a pair.

Additive Genes

Genes that contribute incrementally in varying degrees to the phenotype of an organism.