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Genetics Problem Review

Genetics Problem Review. 1. Who is known as the “grandfather of genetics,” and what type of plant did he do his famous experiments on?. Background. In fruit flies, red eyes (E) is dominant to white eyes (e). You cross a fly that is heterozygous for this trait with a fly with white eyes.

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Genetics Problem Review

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  1. Genetics Problem Review

  2. 1. Who is known as the “grandfather of genetics,” and what type of plant did he do his famous experiments on? Background

  3. In fruit flies, red eyes (E) is dominant to white eyes (e). You cross a fly that is heterozygous for this trait with a fly with white eyes. • 1. If the cross produces 200 offspring, roughly how many will have white eyes? Mendelian (Dominant/Recessive)

  4. In a certain species of rabbits, Black fur (B) is dominant to white fur (b). A cross between two rabbits produces 7 rabbits with white fur and 17 rabbits with black fur. • 1. What are the most likely genotypes of the parent rabbits? Mendelian (Dominant/Recessive)

  5. 1. What is the sex genotype for a male? • 2. What is the sex genotype for a female? X-Linked Background

  6. In humans, colorblindness is X-linked and recessive (b). • A female carrier crosses with an unaffected male. • 1. What percentage of female offspring will be carriers? • 2. What percentage of male offspring will have colorblindness? X-Linked

  7. In humans, the disease hemophilia is X-linked and recessive (h). • A homozygous dominant female crosses with a hemophiliac male. • 1. What percentage of children will have hemophilia? • 2. What percentage of female offspring will be carriers? X-Linked

  8. In cats the gene for calico fur (multicolored) is Co-dominant and X-linked. Females that receive an B (black fur) and an R (orange fur) are calico. • A female calico cat breeds with a black furred male. • 1. What percentage of kittens will be black and male? • 2. What percentage of kittens will be calico and male? • 3. What percentage of kittens will be calico and female? • 4. What percentage of kittens will be male and orange? Co-dominant

  9. Incomplete dominance

  10. A Pink snapdragon flower crosses with another pink snapdragon flower. Use “R” for flower color. • 1. What percentage of flowers produced will be Red? • 2. What percentage of flowers produced will be pink? • 3. What percentage of flowers produced will be white? Incomplete Dominance

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