(a) Show a cross between a pea plant having round & green seed with a pea plant having wrinkled and yellow seeds upto $F_2$ generation. (b) Also write down results of $F_2$ generation.

(a) A cross between a pea plant having round & green seed with a pea plant having wrinkled and yellow seeds can be represented as follows: (b) In the $F_2$ generation, the results will be as follows: - Round and green seeds: 9 - Round and yellow seeds: 3 - Wrinkled and green seeds: 3 - Wrinkled and yellow seeds: 1

Question 143 marksShort AnswerSection A

$F_2$

Heredity

Rules for the Inheritance of Traits - Mendel's Contributions

Official answer

F_2

Mendel's laws

Punnett square

traits

alleles

Marking scheme

1. $(a) 1 mark for correct representation of cross$
2. $F_2$

Hint

$Use the Punnett square to predict the probability of each combination of traits in the offspring.$

Quick oral answer

$The results of the cross between a pea plant having round & green seed with a pea plant having wrinkled and yellow seeds can be represented using a Punnett square. The probability of each combination of traits in the offspring can be predicted using the Punnett square.$

Common mistakes

1. $Forgetting to consider the probability of each combination of traits$
2. $Incorrectly representing the cross$

Analysis and explanation

This problem requires the application of Mendel's laws of inheritance to predict the results of a cross between two pea plants. The problem involves the use of Punnett squares to predict the probability of each combination of traits in the offspring.

Interesting facts

$Mendel's laws of inheritance were first discovered in the 19th century$

$Punnett squares are a useful tool for predicting the probability of each combination of traits in the offspring$

Question details

Q14 of 39 questions

Board: CBSE
Class: Class 10
Subject: Science
Year: 2026
Section: Section A
Marks: 3
Type: Short Answer
Chapter: Heredity
Topic: $Rules for the Inheritance of Traits - Mendel's Contributions$
Bloom's level: Analyzing
Syllabus topic: $Heredity$

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Frequently asked questions

$How many marks does this question carry in CBSE Class 10 Science 2026?$

$This question carries 3 marks in the CBSE Class 10 Science 2026 examination.$

$Which chapter does this question come from in Science?$

$This question is from the chapter "Heredity" in the CBSE Class 10 Science syllabus.$

$What topic does this question cover in Science?$

$This question covers the topic "Rules for the Inheritance of Traits - Mendel's Contributions" from CBSE Class 10 Science.$

$What type of question is this in the CBSE Class 10 Science 2026 paper?$

$This is a Short Answer question from Section A in the CBSE Class 10 Science 2026 paper.$