Principles of Inheritance and Variation BIOLOGY - Principles of Inheritance and Variation

Which of the following causative conditions is displayed in kline felter syndrome ?

On which plant did Mendel conduct his experiments on inheritance ?

The crossing of F₁ to homozygous recessive parent is called:

Extranuclear inheritance occurs in.

The number of phenotypes in ABO blood groups is:

The largest known human gene is the ____________ which contains 2.4 millin base pairs.

For question two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.

1. Both assertion and reason are true and reason is the correct explanation of assertion.
2. Both assertion and reason are true but reason is not the correct explanation of assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.

Assertion: Complementary genes are non-allelic genes.
Reason: Complementary genes interact to produce a completely new trait.

For question two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.

1. Both assertion and reason are true and reason is the correct explanation of assertion.
2. Both assertion and reason are true but reason is not the correct explanation of assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.

Assertion: In a monohybrid cross, F₁ generations indicate dominant characters.
Reason: Dominance occurs only in heterozygous state.

For question two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.

1. Both assertion and reason are true and reason is the correct explanation of assertion.
2. Both assertion and reason are true but reason is not the correct explanation of assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.

Assertion: Hybrids are generally superior than their parents.
Reason: All the dominant traits are present in the hybrid.

For question two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.

1. Both assertion and reason are true and reason is the correct explanation of assertion.
2. Both assertion and reason are true but reason is not the correct explanation of assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.

Assertion : Test cross is a back cross.
Reason: In test cross, individual is crossed with recessive paren.

For question two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.

1. Both assertion and reason are true and reason is the correct explanation of assertion.
2. Both assertion and reason are true but reason is not the correct explanation of assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.

Assertion : The principle of segregation given by Mendel is the principle of purity of gametes.

Reason : Gametes are pure for a character.

Who had proposed the chromosomal theory of the inheritance?

Name the type of cross that would help to find the genotype of a pea plant bearing violet flowers.

Name the stage of cell division where segregation of an independent pair of chromosomes occurs.

Name the type of cross that would help to find the genotype of a pea plant bearing violet flowers.

A male honeybee has 16 chromosomes whereas its female has 32 chromosomes. Give one reason.

Monohybrid and Dihybrid.

Incomplete dominance.

Explain the following terms with example.
Co-dominance.

Homozygous and Hetrozygous.

A diploid organism is heterozygous for 4 loci, how many types of gametes can be produced?

Using a Punnett Square, workout the distribution of phenotypic features in the first filial generation after a cross between a homozygous female and a heterozygous male for a single locus.

What is pedigree analysis? Suggest how such an analysis, can be useful.

When a cross in made between tall plant with yellow seeds (TtYy) and tall plant with green seed (Ttyy), what proportions of phenotype in the offspring could be expected to be,

1. Tall and green.
2. Dwarf and green.

Define and design a test-cross.

Mention the advantages of selecting pea plant for experiment by Mendel.

How is sex determined in human beings?

Two heterozygous parents are crossed. If the two loci are linked what would be the distribution of phenotypic features in F₁ generation for a dibybrid cross?

A child has blood group O. If the father has blood group A and mother blood group B, work out the genotypes of the parents and the possible genotypes of the other offsprings.

Mention any two autosomal genetic disorders with their symptoms.

Briefly mention the contribution of T.H. Morgan in genetics.