If a colorblind woman marries a normal visioned man, their sons will be:

One half normal and one half colorblind

Three fourth colour blind and one fourth normal

A testcross is done to find out

The genotype of an individual by examining the phenotypes of its offsprings from a particular mating

The genotype of an individual for testing for its DNA content

To identify the genotype of recessive parent

Whether two species can interbreed

Identify the incorrect statement from the following.

When Morgan crossed wild type Drosophila for eye colour and body colour with mutated form like white eye and yellow body the recombination was more

When genes are tightly packed on the chromosomes, recombinations are almost nil

Incomplete dominance expression is also noticed in garden pea

Multiple alleles for a character in a population found on the same locus on homologous chromosomes

E M B I B E

Biology Crash Course NEET>Chapter 27 - Principles of Inheritance and Variation>Level 2>Q 20

EASY

NEET

IMPORTANT

Earn 100

Read the following statement having two blanks A and B: The functioning allele which represents the original phenotype is the A allele and the modified allele is generally B allele.

100% studentsanswered this correctly

Important Questions on Principles of Inheritance and Variation

MEDIUM

NEET

IMPORTANT

Biology Crash Course NEET>Chapter 27 - Principles of Inheritance and Variation>Level 2>Q 21

There is a disease in which a single protein which is a part of the cascade of proteins involved in the clotting of blood is affected. This disease is:

EASY

NEET

IMPORTANT

Biology Crash Course NEET>Chapter 27 - Principles of Inheritance and Variation>Level 2>Q 22

An individual shows the following characteristics:

A. Sterile females.

B. Rudimentary ovaries.

C. Lack of secondary sexual characters.

The individual suffers from

MEDIUM

NEET

IMPORTANT

Biology Crash Course NEET>Chapter 27 - Principles of Inheritance and Variation>Level 2>Q 23

In sickle cell anaemia:

MEDIUM

NEET

IMPORTANT

Biology Crash Course NEET>Chapter 27 - Principles of Inheritance and Variation>Level 2>Q 24

If a cross is made between AA and aa, the nature of

F_{1}

progeny will be :-

HARD

NEET

IMPORTANT

Biology Crash Course NEET>Chapter 27 - Principles of Inheritance and Variation>Level 2>Q 25

A husband and wife have normal vision, although both of their fathers are red-green colour-blind, which is inherited as an x-linked recessive trait. What is the probability that their first child will be:-
A. A normal son.
B. A carrier daughter.
C. A colour-blind son.
D. A colour-blind daughter.

MEDIUM

NEET

IMPORTANT

Biology Crash Course NEET>Chapter 27 - Principles of Inheritance and Variation>Level 2>Q 26

In a Mendelian dihybrid cross, the probability of getting seeds with genotype Rryy, RrYy, rrYy, and RrYY in F₂ generation is respectively

EASY

NEET

IMPORTANT

Biology Crash Course NEET>Chapter 27 - Principles of Inheritance and Variation>Level 2>Q 27

Phenylketonuria (PKU) is an inherited disease that refers to

MEDIUM

NEET