What does the progeny of a tall plant with round seeds and a short plant with wrinkled seeds look like?
A.
All are tall with round seeds.
B.
All are short with round seeds.All are short with round seeds.
C.
All are tall with wrinkled seeds.All are tall with wrinkled seeds.
D.
All are short with wrinkled seeds.
Answers
Answer:
The progeny of a tall plant with round seed (TTRR) and a short plant with wrinkled seed (ttrr) would be Tall plant with round seeds (TtRr) and thus will appear same as the allele for tall plant and round seeds are dominant over the alleles for short plants with wrinkled seeds.
Explanation:
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Answer:
The progeny of long plant with round seeds (TTRR) crossed with short plants with wrinkled seeds (ttrr) are all long plants with round seeds (TtRr). This is because tallness and round shape are both dominant traits while shortness and wrinkled shapes of seeds are recessive traits.
When F1 progeny (TtRr) are cross-bred by self pollination, then four types of progeny are produced in F2 generation. Out of these four types of progeny, two types will have traits like parents and the other two will have combination of traits. Thus,
1. Progeny with tall plants and round seeds- 9
2. Progeny with tall plants and wrinkled seeds-3
3. Progeny with short plants and round seeds-3
4. Progeny with short plants and wrinkled seeds-1
Thus, the phenotypic ratio in F2 generation will be- 9:3:3:1