Question 121 markMCQSection A

$The number of chromosomes in parents and offsprings of a particular species undergoing sexual reproduction remain constant due to :$

How do Organisms Reproduce?

Sexual Reproduction

Options

(a)

doubling of chromosomes after zygote formation.

(b)

halving of chromosomes after zygote formation.

(c)

doubling of chromosomes before gamete formation.

(d)

halving of chromosomes at the time of gamete formation.

Official answer

The number of chromosomes in parents and offsprings of a particular species undergoing sexual reproduction remain constant due to halving of chromosomes at the time of gamete formation.

halving of chromosomes

gamete formation

meiosis

Marking scheme

1. $1 mark$

Hint

$Recall the concept of meiosis and its role in sexual reproduction.$

Quick oral answer

$The number of chromosomes in parents and offsprings of a particular species undergoing sexual reproduction remain constant due to halving of chromosomes at the time of gamete formation.$

Common mistakes

1. $doubling of chromosomes$
2. $zygote formation$

Analysis and explanation

The question requires the student to understand the concept of sexual reproduction and how the number of chromosomes remains constant in parents and offsprings. The correct answer is halving of chromosomes at the time of gamete formation, which is a result of the process of meiosis.

Interesting facts

$Meiosis is a specialized type of cell division that reduces the chromosome number by half, resulting in the production of gametes.$

Question details

Q12 of 39 questions

Board: CBSE
Class: Class 10
Subject: Science
Year: 2023
Section: Section A
Marks: 1
Type: MCQ
Chapter: How do Organisms Reproduce?
Topic: $Sexual Reproduction$
Bloom's level: Remembering
Syllabus topic: $Sexual Reproduction$

Spotted a mistake or something unclear?

Tell us and we will fix it.

Frequently asked questions

$How many marks does this question carry in CBSE Class 10 Science 2023?$

$This question carries 1 mark in the CBSE Class 10 Science 2023 examination.$

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

$This question is from the chapter "How do Organisms Reproduce?" in the CBSE Class 10 Science syllabus.$

$What topic does this question cover in Science?$

$This question covers the topic "Sexual Reproduction" from CBSE Class 10 Science.$

$What type of question is this in the CBSE Class 10 Science 2023 paper?$

$This is a MCQ question from Section A in the CBSE Class 10 Science 2023 paper.$