What Is The Phenotypic Ratio Of The F2 Generation After Crossing Purple And White Flowers In Mendelian Complete Dominance?

The F2 generation is 25% PP (homozygous dominant, purple flowers), 50% Pp (heterozygous, purple flowers), and 25% pp (homozygous recessive, white flowers). This is how the white characteristic reappears in the second generation. The phenotype is

3:1, purple to white

.

What is the phenotypic ratio of purple to white flowers in the case of epistasis?

Conversely, there are seven combinations that result in either a cc or a pp, which would yield the white flower phenotype-hence, the

9:7 ratio

of purple to white flowers.

What is the phenotypic ratio of the F2 cross?

Only when you allow the F1 generation offspring to self-pollinate will you perform a dihybrid cross. The resulting F2 generation will have a phenotypic ratio of

9:3:3:1

.

What type of cross produces a 1 1 1 1 phenotypic ratio?

In the

monohybrid cross

, a testcross of a heterozygous individual resulted in a 1:1 ratio. With the dihybrid cross, you should expect a 1:1:1:1 ratio!

What would the phenotype be if purple flowers are dominant to white flowers?

Since all of the offspring have the purple phenotype, this tells us that the

purple

allele is dominant to the white allele. This means that 75% of the offspring displayed the dominant phenotype of purple flowers, and 25% displayed the recessive phenotype of white flowers.

What is ratio of dominant epistasis?

Dominant epistasis- When the expression of both dominant and recessive alleles is masked by a dominant allele from another locus, it is called as dominant epistasis. Its ratio

– 12:3:1

.

Is PP genotype or phenotype?

A simple example to illustrate genotype as distinct from phenotype is the flower colour in pea plants (see Gregor Mendel). There are three available genotypes, PP (

homozygous dominant

), Pp (heterozygous), and pp (homozygous recessive).

What is the genotypic ratio of F2 generation?

The normal phenotypic ratio in F2 generation is 3:1 and the genotypic ratio is

1:2:1

.

What is the genotypic ratio of F2 generation of Dihybrid cross?

Mendel observed that the F2 progeny of his dihybrid cross had a

9:3:3:1 ratio

and produced nine plants with round, yellow seeds, three plants with round, green seeds, three plants with wrinkled, yellow seeds and one plant with wrinkled, green seeds.

What is the genotypic ratio of the F2 offspring What is the phenotypic ratio of the F2 offspring?

As we saw last time, if we start with true-breeding parents (one homozygous dominant, one homozygous recessive), all of the F1 progeny will be heterozygous and show the dominant phenotype, and then these will give rise to a 3:1 ratio of phenotypes in the F2 generation in a monohybrid cross, and to a

9:3:3:1 ratio

of …

What does a 1 1 ratio mean in genetics?

A 1:1 ratio among

progeny suggest one gene is involved in the phenotype which would involve a cross between a heterozygote X homozygote parent

.

5

. A 2:1 ratio among the progeny suggest one gene is involved where the presence of both recessive alleles results in death (ex: Aa x Aa) 6.

What is the 9 3 3 1 ratio?

This 9:3:3:1 phenotypic ratio is the classic Mendelian ratio for

a dihybrid cross

in which the alleles of two different genes assort independently into gametes.

What does the 9 3 3 1 ratio mean?

The 9:3:3:1 ratio simply means that

nine are wild-type meaning they are normal

; six exhibit one mutant and one normal character, three are normal for one trait the other three are normal for the opposite trait; one has both mutant phenotypes.

Which flower color is dominant purple or white?

Can two plants with white flowers produce offspring with purple flowers?

Can two plants with purple flowers produce offspring with white flowers?

Yes

, if both parents are heterozygous for the trait.

What percentage of offspring is homozygous dominant?