HARD
10th CBSE
IMPORTANT
Earn 100

Study the following cross showing self-pollination in F1. Fill in the blank 

Parent         RRYY (Round, Yellow)            X         rryy (Wrinkled, Green)

F1                RrYy (Round, Yellow)              X                  ?

Important Questions on Heredity and Evolution

EASY
10th CBSE
IMPORTANT
NCERT EXEMPLAR PROBLEMS-SOLUTIONS SCIENCE Class X>Chapter 9 - Heredity and Evolution>Multiple Choice Questions (MCQs)>Q 3
A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall plants because
EASY
10th CBSE
IMPORTANT
NCERT EXEMPLAR PROBLEMS-SOLUTIONS SCIENCE Class X>Chapter 9 - Heredity and Evolution>Multiple Choice Questions (MCQs)>Q 6

In human males, all the chromosomes are paired perfectly except one.

This/these unpaired chromosomes is/are

(i) large chromosome

(ii) small chromosome

(iii) Y-chromosome

(iv) X-chromosome

MEDIUM
10th CBSE
IMPORTANT
NCERT EXEMPLAR PROBLEMS-SOLUTIONS SCIENCE Class X>Chapter 9 - Heredity and Evolution>Multiple Choice Questions (MCQs)>Q 22
In peas, a pure tall plant (TT) is crossed with a short plant (tt). The ratio of pure tall plants to short plants in F2 is
HARD
10th CBSE
IMPORTANT
NCERT EXEMPLAR PROBLEMS-SOLUTIONS SCIENCE Class X>Chapter 9 - Heredity and Evolution>Short Answer Type Questions>Q 28
Mention three important features of fossils which help in the study of evolution.
MEDIUM
10th CBSE
IMPORTANT
NCERT EXEMPLAR PROBLEMS-SOLUTIONS SCIENCE Class X>Chapter 9 - Heredity and Evolution>Short Answer Type Questions>Q 30
In human beings, the statistical probability of getting either a male or female child is 50:50. Give a suitable explanation.
HARD
10th CBSE
IMPORTANT
NCERT EXEMPLAR PROBLEMS-SOLUTIONS SCIENCE Class X>Chapter 9 - Heredity and Evolution>Long Answer Type Questions>Q 45

In the given cross, what are the combination of characters in the F2  progeny? What are their ratios?

Parent         RRYY (Round, Yellow)            X         rryy (Wrinkled, Green)

F1                RrYy (Round, Yellow)              X         RrYy (Round, Yellow)

NOTE: MODIFIED QUESTION

MEDIUM
10th CBSE
IMPORTANT
NCERT EXEMPLAR PROBLEMS-SOLUTIONS SCIENCE Class X>Chapter 9 - Heredity and Evolution>Long Answer Type Questions>Q 46
Give the basic features of the mechanism of inheritance.
MEDIUM
10th CBSE
IMPORTANT
NCERT EXEMPLAR PROBLEMS-SOLUTIONS SCIENCE Class X>Chapter 9 - Heredity and Evolution>Long Answer Type Questions>Q 47

Give reasons for the appearance of new combination of characters in the F2 progeny of the cross mentioned below.

F1                RrYy (Round, Yellow)              X         RrYy (Round, Yellow)