In a series of crosses involving pea plants that have round or wrinkled seeds (round is dominant to wrinkled) and yellow or green seeds (yellow is dominant to green), the following ratios were observed in the progeny: Parents -----> Progeny a) round, green x wrinkled, yellow -----> 100% round, yellow b) round, yellow x round, yellow -----> 9/16 round, yellow 3/16 round, green 3/16 wrinkled, yellow 1/16 wrinkled, green c) round, yellow x round, yellow -----> 3/4 round, yellow 1/4 wrinkled, yellow
Question 12
In a series of crosses involving pea plants that have round or wrinkled seeds (round is dominant to wrinkled) and yellow or green seeds (yellow is dominant to green), the following ratios were observed in the progeny:
Parents -----> Progeny
a) round, green x wrinkled, yellow -----> 100% round, yellow
b) round, yellow x round, yellow ----->
9/16 round, yellow
3/16 round, green
3/16 wrinkled, yellow
1/16 wrinkled, green
c) round, yellow x round, yellow ----->
3/4 round, yellow
1/4 wrinkled, yellow
d) wrinkled, yellow x round, yellow ----->
6/16 wrinkled, yellow
2/16 wrinkled, green
6/16 round, yellow
2/16 round, green
On the basis of these progeny ratios, determine a possible genotype for each of the parent plants in each set of crosses (a,b, c, and d). Sometimes more than one genotype is possible, but you need only suggest one.
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