1. In peas, green pod color (G) is dominant over yellow (g) pod color. What are the expected phenotypic ratio for a cross between a parent heterozygous for green pods (Gg) and a parent with yellow pods (gg)? (1 point)
all green
1 green: 1 yellow
all yellow
3 green: 1 yellow
2. Using the traits in question 1, what is the expected phenotypic ratio for a cross between parents that are Gg and Gg? (1 point)
all green
1 green: 1 yellow
all yellow
3 green: 1 yellow
3. In peas, round seeds (R) is dominant over wrinkled (r) seeds. What are the expected genotypic ratio for a cross between two parents that are heterozygous for round seeds? (1 point)
all Rr
1 Rr: 1rr
1RR: 2Rr: 1rr
3Rr: 1rr
4. Using the genetic information from Question 3 what are the expected phenotypic ratio for a cross between a parent that is homozygous for round seeds and a parent with wrinkled seeds? (1 point)
all round
1 round: 1 wrinkled
all wrinkled
3 round: 1 wrinkled
5. In hamsters brown fur (B) is dominant and white fur is recessive (b). Predict the phenotypic ratio for a cross between a white hamster and a brown hamster if the brown hamster's mother was white. (1 point)
1 brown: 1 white
all brown
all white
3 brown: 1 white
6. In squash, the allele or white fruits (W) is dominant over the allele for yellow fruit (w). If a white-fruited plant is crossed with a yellow-fruited plant and 37 offspring were white and 40 offspring were yellow, what are the genotypes of the parents? (1 point)
WW and Ww
Ww and ww
WW and ww
Ww and Ww
7. Using the traits from question 6, predict the genotypic ratio of the offspring if two heterozygous white squash plants are crossed. (1 point)
1 WW: 1 ww
all Ww
1 WW: 2Ww: 1ww
3 Ww: 1ww
8. You are experimenting with flies in which red eyes (R) are dominant over white eyes (r). If the mother has white eyes and the father is heterozygous, what are the expected results for the phenotype of the offspring? (1 point)
1 red eyes: 1 white eyes
all white eyes
3 red eyes: 1 white eyes
all red eyes
9. In dogs, short hair (S) is dominant over long hair (s). Two short-haired dogs are the parents of a litter of eight puppies. Six puppies have short hair and two have long hair. What are the genotypes of the parents? (1 point)
Ss and SS
SS and ss
Ss and ss
Ss and Ss
10. In Guinea pigs, rough coat (R) is dominant over a smooth coat (r). A guinea pig with a rough coat whose father had a smooth coat mates with a guinea pig having a smooth coat. If they have a total of 8 offspring how many piglets would you expect to have a smooth coat? (1 point)
none of the piglets would have smooth coats
4 of the piglets would have smooth coats
all 8 of the piglets would have smooth coats
2 of the piglets would have smooth coats
2007-05-14
14:18:58
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7 answers
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asked by
misscarter
1
in
Science & Mathematics
➔ Biology