ISC Class 12th Biology Chapter 4 - Genetics and Evolution Important Questions with Answers

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Mention any three characteristics of Neanderthal man that lived in near east and central Asia.

Question 2.

State any three goals of the human genome project.

Question 3.

Define the term gene flow.

Question 4.

State Hardy Weinberg's principle.

Question 5.

Define the following:

test cross.

Question 6.

The genotype of a person withTumer's syndrome will be:
(i) 44+XXY
(ii) 44+XYY
(iii) 44+XO
(iv) 44+XXYY

Question 7.

Give any four reasons for Mendel's success.

Question 8.

Mention one significant difference between Epistasis and dominance

Question 9.

A woman with blood group O married a man with blood group AB shows the possible blood groups of the progeny. List the alleles involved in this inheritance.

Question 10.

If the mother is a carrier of colour blindness and the father is normal, the possible genotype and
the phenotype of the offspring of the next generation, with the help of a punnet square

Question 1.

How many chromosomes are present in meiocytes of a fruit fly?

Question 2.

Choose the correct options of the following question:

Study the given monohybrid cross:

A test cross for this Fj will be:

Tt × TT

Tt × tt

Tt × Tt

TT × tt

Question 3.

Choose the correct options of the following question:

In the given pedigree chart, the trait shown is:

Autosomal dominant

Autosomal recessive

X-linked

Y-linked

Question 4.

Define the Homologous chromosomes

Question 5.

Give a scientific term for the following:

An alternative form of the single gene which influences the same character and produces different expressions in different individuals a species.

Question 6.

Give the scientific term for the following:

Multiple effects of a gene on the phenotype of an organism.

Question 7.

Explain Pleiotropy with reference to phenylketonuria.

Question 8.

A homozygous pea plant with round seed coat and yellow cotyledons are crossed with another homozygous, pea plant having wrinkled seed coat and green cotyledons.
(i) Give the types of gametes produced by plants of F-generation.

(ii) Give the dihybrid phenotypic ratio with the corresponding phenotypes.

(iii) State Mendel’s principle involved in this cross.