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Evolution theory and Sex-linked recessive traits

1. List four (4) reasons why Darwin failed to publish his ideas about natural selection for almost 20 years?

2. Eye color in fruit flies (Drosophila) is a sex-linked trait where the dominant allele coes for red eyes and the recessive codes for white eyes. If you cross a white-eyed female with a red-eyed male, what eye colors will the offspring have?

Solution Preview

1. Four reasons why it took Darwin so long to publish:

a. Controversial ideas
The theory of natural selection is a controversial idea that bought a lot of anguish to Darwin given his upbringing and social class. Therefore, Darwin waited a long time to publish to ensure that he was correct about his theories.

b. Illness
Darwin had sea sickness and went through life with numerous health problems further ...

Solution Summary

The two separate questions are answered in the solution. Both questions are typical of what you would see on a mid-term exam in genetics, so they make good study questions.

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