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 74

MEDIUM

NEET

IMPORTANT

Earn 100

In Down's syndrome, karyotyping has shown that the disorder associated with trisomy of chromosome number 21 is usually due to:

9.52% studentsanswered this correctly

Important Questions on Principles of Inheritance and Variation

HARD

NEET

IMPORTANT

Biology Crash Course NEET>Chapter 27 - Principles of Inheritance and Variation>Level 2>Q 75

In a medicolegal case of accidental interchange between two babies in a hospital, the baby of the blood group-A could not be rightly given to a couple with.

EASY

NEET

IMPORTANT

Biology Crash Course NEET>Chapter 27 - Principles of Inheritance and Variation>Level 2>Q 76

A woman with two genes for haemophilia and a gene for colour blindness on one of the 'X' chromosomes marries a normal man. How will the progeny be?

HARD

NEET

IMPORTANT

Biology Crash Course NEET>Chapter 27 - Principles of Inheritance and Variation>Level 2>Q 77

A couple has all the sons who are colour blind with AB blood group. Identify the parents from the following.

EASY

NEET

IMPORTANT

Biology Crash Course NEET>Chapter 27 - Principles of Inheritance and Variation>Level 2>Q 78

If the foetus is

R h^{+}

and mother is

R h^{-}

, then:

MEDIUM

NEET

IMPORTANT

Biology Crash Course NEET>Chapter 27 - Principles of Inheritance and Variation>Level 2>Q 79

A diseased man marries a normal woman. They have three daughters and five sons. All the daughters were diseased and sons were normal. What is the gene of this disease?

MEDIUM

NEET

IMPORTANT

Biology Crash Course NEET>Chapter 27 - Principles of Inheritance and Variation>Level 2>Q 80