What is reciprocal cross? Explain the phenotypic and genotypic ratio obtained in offsprings, when F 1 generation is crossed with Homozygous dominant parents.

The reciprocal cross involves testing the role of parental sex on the inheritance pattern in breeding experiments. It involves crossing a pair of parents with the sexes reversed resulting in two reciprocal crosses. For example, it is used if a biologist desired to determine whether a hypothetical allele Z, a variant of some gene A, is on the male or female sex chromosome. If a homozygous tall (TT) plant had crossed with a homozygous dwarf (tt) plant, then in the F 1 generation all plants were hybrid or heterozygous tall (Tt). In heterozygous conditions, both alleles are not impure with one another. At the time of gamete formation, both alleles segregate each other and enter different gametes. Due to this segregation dwarfism (tt), the character reappears similarly in the F 2 generation phenotypic ratio obtained from the F 2 generation is 3:1, and the genotypic ratio is 1:2:1.

What is reciprocal cross? Explain the phenotypic and genotypic ratio obtained in offsprings, when F 1 generation is crossed with Homozygous dominant parents.

The reciprocal cross involves testing the role of parental sex on the inheritance pattern in breeding experiments. It involves crossing a pair of parents with the sexes reversed resulting in two reciprocal crosses. For example, it is used if a biologist desired to determine whether a hypothetical allele Z, a variant of some gene A, is on the male or female sex chromosome. If a homozygous tall (TT) plant had crossed with a homozygous dwarf (tt) plant, then in the F 1 generation all plants were hybrid or heterozygous tall (Tt). In heterozygous conditions, both alleles are not impure with one another. At the time of gamete formation, both alleles segregate each other and enter different gametes. Due to this segregation dwarfism (tt), the character reappears similarly in the F 2 generation phenotypic ratio obtained from the F 2 generation is 3:1, and the genotypic ratio is 1:2:1.

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E M B I B E

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 9 - Heredity and Evolution>Rajasthan Board-2020>Q 7

MEDIUM

10th Rajasthan Board

IMPORTANT

Earn 100

Explain back cross and test cross with example.

Important Questions on Heredity and Evolution

EASY

10th Rajasthan Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 9 - Heredity and Evolution>Rajasthan Board-2018>Q 1

What is fossil? Write the name of two vestigial organs found in the human body.

MEDIUM

10th Rajasthan Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 9 - Heredity and Evolution>Rajasthan Board-2019>Q 2

Explain the process of fossil formation. By which method can the age of a fossil be determined?

HARD

10th Rajasthan Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 9 - Heredity and Evolution>Rajasthan Board-2018>Q 3

What is reciprocal cross? Explain the phenotypic and genotypic ratio obtained in offsprings, when F₁ generation is crossed with Homozygous dominant parents.

MEDIUM

10th Rajasthan Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 9 - Heredity and Evolution>Rajasthan Board-2019>Q 4

The ancient grantha “Charak Samhita” has been written in which language? Explain the knowledge of charak about genetics.

MEDIUM

10th Rajasthan Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 9 - Heredity and Evolution>Rajasthan Board-2019>Q 5

Explain Mendel's Law of dominance with example. Write any two importance of Mendel's law of inheritance.

EASY

10th Rajasthan Board