A variety of Pelargonium has yellow leaves. When plants of this variety are crossed, the resulting seeds produce green, yellow and white seedlings in the ratio 1 : 2 : 1. If plants with yellow leaves are crossed with plants with green leaves, what would the expected ratio of phenotypes in the offspring be?

Question

22-04-2020
Social Studies

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A variety of Pelargonium has yellow leaves. When plants of this variety are crossed, the resulting seeds produce green, yellow and white seedlings in the ratio 1 : 2 : 1. If plants with yellow leaves are crossed with plants with green leaves, what would the expected ratio of phenotypes in the offspring be?

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hafsaabdulhai hafsaabdulhai · Answer 1 · 2020-04-25T10:49:52+02:00

Answer:

Ratio of green is to white will b 1:1

Explanation:

Let 'G' be dominant green allele.

Let 'W' be recessive whiite allele.

Let a yellow plant will have 'GW' genotype

Crossing two yellow leaves plants will give one green, 2 yellow and 1 white leaves plants as shown in Punnet Square attached.

So we can conclude that

'G' is dominant green allele.

'W' is recessive whiite allele.

yellow plants have 'GW' genotype.

A cross between yellow leaf plant (GW allele) and green leaf plant (GG allele) will give two green leaf plant and 2 yellow leaf plant as shown in Punnet Square

kasliwalalvi24 kasliwalalvi24 · Answer 2 · 2021-11-30T11:23:40+01:00

Law of Segregation is the first law of inheritance, proposed by Mendel. It states that a cross between F1 hybrids displaying incomplete dominance is predicted to give a 1:2:1 ratio.

The ratio of green leaves to yellow leaves is 1:1.

The allele for green leaves is G, which is dominant.
The allele for white leaves is W, which is recessive.
Also, the genotype of a plant with yellow leaves is GW.

The cross between the F1 progeny having yellow leaves will result in the 1 green, 2 yellow, and 1 white leaves plant.

Find the Punnett Square in the attachment given below.

Thus, it can be concluded that the G is dominant, which is expressed in a reduced ratio, whereas W is a recessive allele for white. The plants with GW genotype will lead to yellow leaves plants.

Also, if the yellow leaves plant will be crossed with green leaves plant, it will result in the two green leaf plant and two yellow leaves plant.

Find the attachment given below.

Therefore, incomplete dominance leads to the ratio of 1:1.

To know more about incomplete dominance, refer to the following link:

https://brainly.com/question/14053639