What is the phenotype of F2 progeny and why?

Cause: Nondisjunction During Mitosis or Meiosis

What is phenotype of F1 progeny and why?

i) The phenotype of F1 progeny will be All plants with round shaped and yellow coloured seeds due to the presence of dominant alleles for round shaped and yellow colour.

What are the expected phenotypic in F2 generation?

Expected genotype and phenotype ratios

This is a cross between two purebreds, which will produce a F1 generation consisting entirely of dihybrids. 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 are the phenotype ratios for the F2 generation?

We get the dominant phenotype in plants that have at least one dominant allele of EACH of the two genes; otherwise we get the recessive phenotype. So, the observed ratio in the F2 generation is 9:7.

What are the genotypic and phenotypic ratios of the F2 generation?

The resulting F2 genotype ratios were 25 percent SS, 50 percent Ss and 25 percent ss, which can also be written as 1:2:1. Because of dominance, the phenotype, or visible trait, ratios were 75 percent smooth and 25 percent wrinkled, which can also be written as 3:1.

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What is the phenotype of F2 progeny?

In the F2 progeny, the dominant phenotype (yellow) was observed in 75% of the progeny and the recessive (green) appeared in only 25% of the progeny. Note that discrete phenotypes were obtained (yellow or green), not a continuum of phenotypes.

Why is the F2 progeny different from the F1 progeny?

F1 progeny shows the traits of only one parent while in F2 progeny the traits of parents are randomly generated.

What phenotype means?

The term “phenotype” refers to the observable physical properties of an organism; these include the organism’s appearance, development, and behavior. An organism’s phenotype is determined by its genotype, which is the set of genes the organism carries, as well as by environmental influences upon these genes.

Why is the F2 generation important?

Mendel’s quantitative analysis of the F2 generation led him to conceiving the fundamental principles of heredity, i.e. Law of Segregation and Law of Independent Assortment.

How many types of phenotype and genotype will be formed in F2 generation?

in the offspring. F2 showed 4 different phenotypes: the round and yellow traits did not stay linked to each other. Ratios for each trait corresponds to what one would expect from monohybrid crosses.

What is the phenotypic ratio of F1 generation?

The phenotypic ratio is 9:3:3:1 whereas the genotypic ratio is 1:2:1:2:4:2:1:2:1.