CBSE Class 12-science Answered
(a)
You are given tall pea plants with yellow seeds whose genotypes are
unknown. How would you find the genotype of these plants? Explain with the help of a cross.
(b) Identify a, b and c in the table
given
below:
Sr.
No.
Pattern
of inheritance
Monohybrid
F1 phenotypic expression
1.
Co-dominance
a
2.
b
The progeny resembled only one of the parents
3.
Incomplete dominance
c
Asked by Topperlearning User | 16 Jun, 2014, 02:47: PM
Expert Answer
(a) Test cross will be performed to know the genotype of the given tall pea plants with yellow seeds.
If all the plants of the F1 generation are tall with yellow seeds, then the parent is homozygous dominant (Case i). If the plants in the F1 generation are in the ratio 1:1:1:1, then the parent plant is heterozygous dominant.
(b) a: Both the forms of a trait are equally expressed in the F1 generation.
b: Dominance
c: Phenotypic expression of the F1 generation is somewhat intermediate between the two parental forms of a trait.
Answered by | 16 Jun, 2014, 04:47: PM
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