Question

If several pea plants with the genotype TTGg are crossed with pea plants with the genotype Ttgg, what percentage of the offspring will be expected to have the TTGg allele combination?

Answer 1

let's consider,

male plant- TTGg

female plant- Ttgg.

》There are many methods to solve this ques., here used will be the punnet-square method as it is mostly prefered in subjective exams.

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1. first seperate the gametes from each parent.
2. then placed the male/female in the horizontal, vertical columns.
3. and then form the 4 possible gamete pairing.
4. then Multiply each with next ...

▪︎▪︎After seeing the above image, we can conclude:

• total offsprings are 16...

1)TTGg - $\dfrac{4}{16}$

2)TtGg - $\dfrac{4}{16}$

3)TTgg - $\dfrac{4}{16}$

4)Ttgg - $\dfrac{4}{16}$

》percentage of offsprings with TTGg trait?

• TTGg - $\dfrac{4}{16}$

• TTGg - $\dfrac{4}{16}×100$%

TTGg = 25% -------answer.

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Answer 2

Explanation:

let's consider,

male plant- TTGg

female plant- Ttgg.

》There are many methods to solve this ques., here used will be the punnet-square method as it is mostly prefered in subjective exams.

--------

first seperate the gametes from each parent.

then placed the male/female in the horizontal, vertical columns.

and then form the 4 possible gamete pairing.

then Multiply each with next ...

▪︎▪︎After seeing the above image, we can conclude:

• total offsprings are 16...

1)TTGg - $\dfrac{4}{16}$

2)TtGg - $\dfrac{4}{16}$

3)TTgg - $\dfrac{4}{16}$

4)Ttgg - $\dfrac{4}{16}$

》percentage of offsprings with TTGg trait?

• TTGg - $\dfrac{4}{16}$

• TTGg - $\dfrac{4}{16}×100$%

TTGg = 25% -------answer.

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