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Gene Pair

Gene Pair. Answer: Allele. Physical Appearance of a trait. Answer: Phenotype. Diagram that shows the history of a trait as it is passed from one generation to the next. Answer: Pedigree. Structure in the cell that contains the genetic information. Answer: Chromosome.

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Gene Pair

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  1. Gene Pair Answer: Allele

  2. Physical Appearance of a trait Answer: Phenotype

  3. Diagram that shows the history of a trait as it is passed from one generation to the next Answer: Pedigree

  4. Structure in the cell that contains the genetic information Answer: Chromosome

  5. Trait whose phenotype is influenced by more than one gene Answer: Polygenic

  6. BB Answer: Pure Dominant Homozygous

  7. Hairy knuckles are dominant to non-hairy knuckles in humans HH__ Hh __ hh __ Answer: Hairy, Hairy, Non-hairy

  8. The dominant allele (F) codes for grey fur and the recessive allele (f) codes for black fur. The female dog has black fur. The male dog has black fur. Figure out the phenotypes and genotypes of their possible puppies by using a Punnett Square. Answer:

  9. In fruit flies, red eyes are dominant (E). White eyes are recessive (e). If the female fly has white eyes and the male fly has homozygous dominant red eyes, what are the possible phenotypes and genotypes of their offspring? Answer:

  10. Widow’s peak is dominant. Look at the phenotypes of Beyoncé and Jay Z. If these two had children, could they have children with a widow’s peak? Why or why not? Use a Punnett Square to explain your answer. Answer:

  11. Which members of the family above are afflicted with Huntington’s Disease? Answer: I1, II2, II3, II7, III3

  12. There are no carriers for Huntington’s Disease- you either have it or you don’t. With this in mind, is Huntington’s disease caused by a dominant or recessive trait? Answer: Dominant

  13. The pedigree to the right shows a family’s pedigreefor Hitchhiker’s Thumb. Is this traitdominant or recessive? Answer: Recessive

  14. Is it possible for individual IV-2 to be a carrier? Yes Why? b/c parents were heterozygous Answer: Yes because parents were heterozygous

  15. How are individuals III-4 and III-5 related? Answer: Cousins/Marriage

  16. Blood TypeHomozygous for the “B” allele Answer: IBIB

  17. Pretend that Brad Pitt is homozygous for the type B allele, and Angelina Jolie is type “O.” What are all the possible blood types of their baby? Answer:

  18. In snapdragons, flower color is controlled by incomplete dominance. The two alleles are red (R) and white (R’). The heterozygous genotype is expressed as pink. A pink-flowered plant is crossed with a white-flowered plant. What is the probability of producing a pink-flowered plant? ____% Answer:

  19. Two short-tailed (Manx) cats are bred together. They produce three kittens with long tails, five short tails, and two without any tails. From these results, how do you think tail length in these cats are inherited? Show the genotypes for both the parents and the offspring to support your answer. Answer:

  20. Show the cross of a man who has hemophilia with a woman who is a carrier. What is the probability that their children will have the disease? Answer:

  21. 23rd chromosome pair Answer: Sex chromosome

  22. What kind of trait is colorblindness? Answer: Sex-linked/recessive

  23. A genetic situation in which one allele does not completely dominate another allele, and therefore results in a new phenotype. Answer: Incomplete Dominance

  24. Two parents think their baby was switched at the hospital. Its 1968, so DNA fingerprinting technology does not exist yet. The mother has blood type “O,” the father has blood type “AB,” and the baby has blood type “B.” Mother’s genotype: _______ Father’s genotype: _______ Baby’s genotype: ______ or ________Punnett square showing all possible genotypes for children produced by this couple. Was the baby switched? Answer:

  25. In cats, the gene for calico (multicolored) cats is codominant. Females that receive a B and an R gene have black and orange splotches on white coats. Males can only be black or orange, but never calico. Here’s what a calico female’s genotype would look like XB XR 10. Show the cross of a female black cat, with a male orange cat. What percentage of the kittens will be calico and female? _____ What color will all the male cats be? _____ Answer:

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