In pea plants, yellow seeds are dominant to green, If a heterozygous yellow seeded plant is crossed with a green seeded plants, what ratio of yellow and green seeded plants would you expect in F1 generation?a)9:1b)3:1c)50:50d)1:3Correct answer is option 'C'. Can you explain this answer?

Question

Answer

Answer

Explanation:

When we cross a heterozygous yellow seeded pea plant (Yy) with a green seeded pea plant (yy), we can use a Punnett Square to predict the possible outcomes of the first generation (F1) offspring:

| | Y | y |
|---|---|---|
| y | Yy | yy |
| y | Yy | yy |

As we can see, all of the offspring will be heterozygous for seed color (Yy), but they will all have a yellow phenotype. This is because the yellow allele (Y) is dominant over the green allele (y), so even though the offspring have one copy of each allele, the yellow trait will be expressed.

Therefore, the expected ratio of yellow to green seeded plants in the F1 generation is 100% yellow and 0% green, or simply 50:50.

Answer

Explanation:

To understand the answer, we need to know the basic concepts of genetics and Mendelian laws.

Mendelian laws:

Mendelian laws are the basic principles of genetics discovered by Gregor Mendel in the 19th century. These laws explain the patterns of inheritance of traits from one generation to another.

Law of Dominance:

According to this law, when two different alleles are present in an individual, one allele expresses itself and the other remains hidden.

In pea plants, yellow seeds are dominant to green seeds. So, if a pea plant has one allele for yellow seeds (Y) and one allele for green seeds (y), it will produce yellow seeds because the Y allele is dominant.

Genotype and phenotype:

The genotype of an individual refers to the genetic makeup of an individual, while the phenotype refers to the physical appearance or expression of the traits.

In pea plants, the genotype for yellow seeds can be either homozygous dominant (YY) or heterozygous (Yy), while the genotype for green seeds is homozygous recessive (yy).

Cross between heterozygous yellow seeded plant and green seeded plant:

When a heterozygous yellow seeded plant (Yy) is crossed with a green seeded plant (yy), the possible gametes produced by the heterozygous plant are Y and y, while the gametes produced by the green plant are y only.

The Punnett square for this cross is:

| | Y | y |
|---|---|---|
| Y | YY | Yy |
| y | Yy | yy |

The F1 generation will have the following genotypes and phenotypes:

- YY: yellow seeds (homozygous dominant)
- Yy: yellow seeds (heterozygous)
- yy: green seeds (homozygous recessive)

The ratio of yellow to green seeded plants in the F1 generation is 1:1, which means 50% of the plants will have yellow seeds and 50% of the plants will have green seeds.

Answer:

Therefore, the correct answer is option 'C' (50:50).

Answer

Explanation:
When a heterozygous yellow seeded plant (Yy) is crossed with a green seeded plant (yy), the possible gametes produced by the heterozygous plant are Y and y. The gametes produced by the green seeded plant are y and y.
The Punnett square for the cross would be:

| | Y | y |
|---|---|---|
| y | Yy| yy|
| y | Yy| yy|

From this Punnett square, we can see that all the F1 progeny will be Yy, which means that they will carry one dominant yellow allele and one recessive green allele. Since yellow is dominant, all the F1 progeny will have yellow seeds.

Therefore, the ratio of yellow seeded plants to green seeded plants in the F1 generation will be 100% yellow (or 50:50 if we consider the ratio of Yy to yy genotypes). Hence, option C is the correct answer.

Answer

Heterozygous yellow seeded plant (Yy ) when crossed with green seeded plant (yy) to obtain F1 generation then u will get two phenotypes of gametes :- Yy , Yy ,yy and yy so the ratio u get is 50:50
.....here's the answer ,hope this will help u!!

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