Question

In a monohybrid cross, what is the ratio of homozygous dominant and homozygous recessive individuals in F2 generation?

Answer 1

Hint: The mating of two individuals which results in the combination of genetic material inside the offspring is known as the cross. This individual carries out the genetic material of each parent. The parent organism is genetically compatible and has different varieties or closely related species.

Complete step by step answer:
The ratio of the homozygous dominant and homozygous recessive individual in F2 generation is 1:1.
 In true-breeding parents, there is one homozygous dominant and one homozygous recessive individual present in F1 generation. Then the F1 generation produces all heterozygous individuals which should dominate phenotype and give rise to 3:1 of phenotypes in F2 generation.
Genotype: TT × TT
Gametes: T × t
F1 Progeny: TT
Selfing of F1: Tt × Tt
Gamete: T,t T,t
F2 progeny: TT, TT, TT, TT
1TT: 1Tt

Additional information: The cross of two individuals with homozygous genotypes that result in the opposite phenotype of a certain genetic trait is known as a monohybrid cross. The two monohybrid traits are TT and tt. This cross is responsible for the Inheritance of one gene which can be shown by using Punnett square. The factors which are responsible for the Inheritance of traits from one generation to another are known as genes. They contain a pair of alleles that code for different traits. The homozygous pair is recognized as TT and the heterozygous pair is recognized as TT.

The first step of the monohybrid cross involves the cross of the homozygous trait of an organism. The next stage involves the cross of heterozygous traits to confirm whether the trait is dominant or recessive. The monohybrid cross takes place to determine the relationship between the two alleles. The character which is studied in a monohybrid cross is governed by two or multiple variations. If the cross satisfies the monohybrid condition which is usually detected by the distribution of second-generation offspring and is known as monohybrid ratio.

Note: Gregor Mendel is known as the father of modern genetics who discovered basic principles of heredity through his experiments in his monastery’s garden. All humans are more than $99\%$ identical on the genetic level. Voluminous eyelashes were caused by a genetic mutation to Elizabeth Taylor. Elephants can be protected by cancer if the zombie gene is presented in them. We can be prevented from living for more than 125 years by our genes.