Study Mendel's cross between two plants with a pair of contrasting characters. RRYY x rryy (Round Yellow x Wrinkled Green). He observed 4 types of combinations in F 2 , generation. Which of these were new combinations? Why do new features which are not present in the parents, appear in F 2 , generation?

In Mendel's classic experiments on inheritance, one of the key principles he discovered was the Law of Independent Assortment, which explains how genes for different traits segregate independently during gamete formation. To illustrate this principle, let's consider Mendel's cross between two plants with a pair of contrasting characters: Round Yellow ( RRYY ) and Wrinkled Green ( rryy ). Now, let's examine the combinations observed in the F 2 generation: Round Yellow (RRYY) . Round Green (RRyy) Wrinkled Yellow (rrYY) Wrinkled Green (rryy) The new combinations observed in the F 2 generation are "Round Green" ( RRyy ) and "Wrinkled Yellow" ( rrYY ). These combinations were not present in the parental generation and represent the result of the independent assortment of alleles during gamete formation. These new combinations arise due to Mendel's Laws of Independent Assortment and Segregation, which lead to genetic diversity in the offspring. Law of Independent Assortment: This principle states that alleles (gene variants) for different traits segregate independently during gamete formation. In this case, the alleles for seed shape (Round or Wrinkled) segregate independently of the alleles for seed colour (Yellow or Green). Each combination of seed shape and colour is equally likely in the offspring, leading to the appearance of new combinations not present in the parents.

E M B I B E

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 9 - Heredity and Evolution>CBSE-2022 (Outside Delhi Term II - I)

Embibe Experts Solutions for Chapter: Heredity and Evolution, Exercise 1: CBSE-2022 (Outside Delhi Term II - I)

Author:Embibe Experts

Embibe Experts Science Solutions for Exercise - Embibe Experts Solutions for Chapter: Heredity and Evolution, Exercise 1: CBSE-2022 (Outside Delhi Term II - I)

Attempt the free practice questions on Chapter 9: Heredity and Evolution, Exercise 1: CBSE-2022 (Outside Delhi Term II - I) with hints and solutions to strengthen your understanding. EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE solutions are prepared by Experienced Embibe Experts.

Questions from Embibe Experts Solutions for Chapter: Heredity and Evolution, Exercise 1: CBSE-2022 (Outside Delhi Term II - I) with Hints & Solutions

MEDIUM

10th CBSE

IMPORTANT

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

A Mendelian experiment consisted of breeding pea plants bearing violet flowers with pea plants bearing white flowers. What will be the result in F1 progeny?

MEDIUM

10th CBSE

IMPORTANT

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

What are homologous structures? Give an example.

MEDIUM

10th CBSE

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 9 - Heredity and Evolution>CBSE-2019>Q 3

‘‘The sex of a newborn child is a matter of chance and none of the parents may be considered responsible for it.’’ Justify this statement with the help of a flow chart showing sex-determination in human beings.

MEDIUM

10th CBSE

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 9 - Heredity and Evolution>CBSE-2020>Q 4

What are homologous structures? Give an example. Is it necessary that homologous structures always have a common ancestor? Justify your answer.

HARD

10th CBSE

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 9 - Heredity and Evolution>CBSE-2020>Q 5

What is the law of dominance of traits? Explain with an example.

EASY

10th CBSE

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 9 - Heredity and Evolution>CBSE-2020>Q 6

Why are the traits acquired during the lifetime of an individual not inherited? Explain?

HARD

10th CBSE

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 9 - Heredity and Evolution>CBSE-2023 (Delhi - I)>Q 19

Study Mendel's cross between two plants with a pair of contrasting characters. RRYY x rryy (Round Yellow x Wrinkled Green). He observed 4 types of combinations in F₂, generation. Which of these were new combinations? Why do new features which are not present in the parents, appear in F₂, generation?

EASY

10th CBSE

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 9 - Heredity and Evolution>CBSE-2023 (Delhi - III)>Q 21

Which one of the given statements in incorrect: