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 3>Q 37

MEDIUM

NEET

IMPORTANT

Earn 100

Study the given pedigree chart for sickle-cell anaemia and select the most appropriate option for the genotypes.

56.25% 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 3>Q 38

The disease sickle-cell anaemia is caused by the substitution of (i)... by (ii).... at the (iii).... position of (iv).... globin chain of the haemoglobin molecule. Which of the following correctly fills the blanks in the above statement?

MEDIUM

NEET

IMPORTANT

Biology Crash Course NEET>Chapter 27 - Principles of Inheritance and Variation>Level 3>Q 39

A colourblind man

(X^{C} Y)

marries a woman who is carrier for haemophilia

({XX}^{h}) .

Which of the following is true for their progenies?

MEDIUM

NEET

IMPORTANT

Biology Crash Course NEET>Chapter 27 - Principles of Inheritance and Variation>Level 3>Q 48

Read the following statements and state true (T) and false (F):

A. Mendel experimented on $14$ true breeding pea plant varieties.

B. Mendel conducted hybridization experiments on garden pea from $1856$ to $1863 .$

C. All genes for seven characters studied by Mendel were located on same chromosomes.

D. Mendel’s work on inheritance of characters remain unrecognized for $16$ years after his death.

Learn and Prepare for any exam you want !

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Genotypes of parents	Genotypes of $1^{st}$ and $3^{rd}$ child in $F_{1}$
${Hb}^{A} {Hb}^{S}, {Hb}^{A} {Hb}^{A}$	${Hb}^{A} {Hb}^{A}, {Hb}^{A} {Hb}^{S}$

Genotypes of parents	Genotypes of $1^{st}$ and $3^{rd}$ child in $F_{1}$
${Hb}^{A} {Hb}^{S}, {Hb}^{A} {Hb}^{S}$	${Hb}^{A} {Hb}^{A}, {Hb}^{A} {Hb}^{A}$

Genotypes of parents	Genotypes of $1^{st}$ and $3^{rd}$ child in $F_{1}$
${Hb}^{A} {Hb}^{A}, {Hb}^{A} {Hb}^{s}$	${Hb}^{A} {Hb}^{A}, {Hb}^{S} {Hb}^{S}$

Genotypes of parents	Genotypes of $1^{st}$ and $3^{rd}$ child in $F_{1}$
${Hb}^{A} {Hb}^{S}, {Hb}^{A} {Hb}^{S}$	${Hb}^{A} {Hb}^{S}, {Hb}^{S} {Hb}^{S}$