Question

What will the F1 generation produce if pure breeding parents for one trait were crossed as...

What will the F1 generation produce if pure breeding parents for one trait were crossed as follows: yellow seed, dominant X green seed, recessive?

100% yellow seeds.

75% green seeds; 25% yellow seeds.

50% yellow seeds; 50% green seeds.

not enough information given.

75% yellow seeds; 25% green seeds.
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Answer #1

Answer : 100 % yellow seeds

It is given that yellow seed is the dominant trait (Y) and green seed is the recessive trait (g).

The cross is between Yellow seed x Green seed

Also, it is given that both parents are purebreeding (i.e, homozygous)

So, homozygous Yellow seed (YY) x homozygous green seed (gg)

The F1 generation refers to the first generation obtained when parents are crossed.

To find the F1 progeny, let us create the Punnet square :

x g g
Y Yg Yg
Y Yg Yg

All the F1 offsprings produced are : Yg

We know that Y is the dominant trait ( Yellow seed ) , which will be expressed.

So, 100 % of the F1 progeny will produce Yellow seeds.

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