Green and red colour of seeds recessive and dominant respectively. Out of F1 and F2 ,in which generation will the green seeds appear , if both parents are not hybrid. Explain by giving reasons.
what do u mean by hybrid in this case?
Is the answer is that they will never appear??
Asked by sucharitasahoo1
| 4th Jan, 2018,
03:02: PM
Expert Answer:
Trait: Seed colour
Dominant trait: Red colour (RR)
Recessive trait: Green colour (rr)
Cross: Red seeds (RR) x Green seeds (rr)
Punnett square:
|
|
R |
R |
|
r |
Rr |
Rr |
|
r |
Rr |
Rr |
F1 generation:
100% red seeds (Rr)
F1 Cross: Red seeds (Rr) x Red seeds (Rr)
Punnett square:
|
|
R |
r |
|
R |
RR |
Rr |
|
r |
Rr |
rr |
F2 generation:
Phenotypic ratio: 3 :1 = Red seeds : Green seeds
Genotypic ratio : 1 : 2 : 1 = RR : Rr : rr
Hybrid: Refer to a heterozygous condition. It is an offspring obtained by crossing two true-breeding (homozygous) individuals differing in the traits of interest.
Answered by Sheetal Kolte
| 4th Jan, 2018,
03:32: PM
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