5. When a Chinese hamster with white spots is crossed with another hamster that has no spots, approximately 1/2 of the offspring have white spots and 1/2 have no spots. When two hamsters with white spots are crossed, 2/3 of the offspring possess white spots and 1/3 have no spots. 1. a. What is the genetic basis of white spotting in Chinese hamsters? 2. b. Is it feasible to produce Chinese hamsters that breed true for white spotting?

Human Anatomy & Physiology (11th Edition)
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5. When a Chinese hamster with white spots is crossed with another hamster that has no spots, approximately 1/2 of
the offspring have white spots and 1/2 have no spots. When two hamsters with white spots are crossed, 2/3 of the
offspring possess white spots and 1/3 have no spots.
1. a. What is the genetic basis of white spotting in Chinese hamsters?
2. b. Is it feasible to produce Chinese hamsters that breed true for white spotting?
6. When a yellow female Labrador retriever was mated with a brown male, half of the puppies were brown and half
were yellow. The same female, when mated with a different brown male, produced only brown offspring. Explain these
results. What genetic principle is this an example of?
7. In some goats, the presence of horns is produced by an autosomal gene that is dominant in males and recessive in
females. A horned female is crossed with a hornless male. The F, offspring are intercrossed to produce the F2. What
proportion of the F2 females will have horns? What genetic principle is this an example of?
Transcribed Image Text:5. When a Chinese hamster with white spots is crossed with another hamster that has no spots, approximately 1/2 of the offspring have white spots and 1/2 have no spots. When two hamsters with white spots are crossed, 2/3 of the offspring possess white spots and 1/3 have no spots. 1. a. What is the genetic basis of white spotting in Chinese hamsters? 2. b. Is it feasible to produce Chinese hamsters that breed true for white spotting? 6. When a yellow female Labrador retriever was mated with a brown male, half of the puppies were brown and half were yellow. The same female, when mated with a different brown male, produced only brown offspring. Explain these results. What genetic principle is this an example of? 7. In some goats, the presence of horns is produced by an autosomal gene that is dominant in males and recessive in females. A horned female is crossed with a hornless male. The F, offspring are intercrossed to produce the F2. What proportion of the F2 females will have horns? What genetic principle is this an example of?
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