Genetics

Question 1

Father of genetics

Answer 1

Gregor Johann Mendel

Question 2

The branch of science which deals with hereditary

Answer 2

Genetics

Question 3

The chromosomes responsible for sex determination

Answer 3

sex chromosomes

Question 4

A hereditary disease in which blood does not clot

Answer 4

Haemophilia

Question 5

The unit of hereditary

Answer 5

Gene

Question 6

Number of pairs of autosomes in humans

Answer 6

22 pairs

Question 7

The condition in which both alleles are identical

Answer 7

Homozygous

Question 8

Monohybrid phenotypic ratio

Answer 8

3:1

Question 9

The chemical substance which constitute genes

Answer 9

DNA

Question 10

The allele which express itself on the other

Answer 10

dominant allele

Question 11

One genetic disease

Answer 11

Haemophilia

Question 12

The genetic make up of an organism

Answer 12

Genotype

Question 13

The cross between one pair of contrasting characters

Answer 13

Monohybrid cross

Question 14

Two sex linked inherited disease

Answer 14

Haemophilia, colour blindness

Question 15

The plant on which Mendel had worked

Answer 15

Garden Pea plant (Pisum Sativum)

Question 16

The type of allele which expresses itself only in homozygous state

Answer 16

recessive

Question 17

A sudden heritable change in the gene

Answer 17

Mutation

Question 18

The part of gene responsible for a particular characteristics in an individual

Answer 18

Allele

Question 19

Genetics is the study of transmission of

Answer 19

characters

Question 20

The small differences among individuals

Answer 20

Variations

Question 21

Dihybrid Phenotypic ratio

Answer 21

9:3:3:1

Question 22

Upon ______________ diploid condition is restored

Answer 22

fertilisation

Question 23

Phenotype is the observable character ____________ controlled

Answer 23

genetically

Question 24

A quality or characteristic that can belong to only one person

Answer 24

trait

Question 25

What is gene?

Answer 25

Basin unit of hereditary, located on the chromosome

Question 26

Which one of the following is the phenotypic monohybrid ratio in F2 generation

Answer 26

3:1

Question 27

If a pure tall plant is crossed with a pure dwarf plant, then offspring will be

Answer 27

all tall

Question 28

The 9 : 3 : 3 : 1 dihybrid ratio is due to

Answer 28

independent assortment

Question 29

A plant with green pods and smooth seeds with genotype Ggss will give rise to the following gametes

Answer 29

Gs and gs

Question 30

The disease colour blindness is a

Answer 30

Recessive X-linked disease

Question 31

The physical expression of a character is called

Answer 31

Phenotype

Question 32

Purity of gametes is linked to

Answer 32

Law of segregation

Question 33

The phenotypic dihybrid ratio of F2 generation is

Answer 33

9:3:3:1

Question 34

If the mother is normal and the father is haemophilic, then their two daughters will be

Answer 34

carrier

Question 35

Study of laws of inheritance of characters

Answer 35

Genetics

Question 36

Autosomes

Answer 36

Chromosomes other than the pair of sex chromosomes

Question 37

A gene that can express only when in a similar pair

Answer 37

Recessive gene

Question 38

The alternative forms of a gene

Answer 38

Allele

Question 39

Homologous chromosomes

Answer 39

Chromosomes similar in size and shape

Question 40

Which one of the following genotypes is homozygous dominant and which one homozygous recessive in regard to tongue rolling: Rr, rr, RR

Answer 40

Homozygous recessive – rr Homozygous dominant - RR

Question 41

Duplicated chromosomes remain attached at a point termed as

Answer 41

centromere

Question 42

The full complement of DNA of an organism is termed as

Answer 42

Genome

Question 43

The inheritable feature of an organism is termed as

Answer 43

character

Question 44

__________ flower position is a dominant trait of pea flower.

Answer 44

Axillary

Question 45

Law of Dominance

Answer 45

Out of a pair of contrasting characters present together, only one is able to express itself while the other remains suppressed. The one that expresses is the dominant character and the one that is unexpressed is the recessive one.

Question 46

Law of Segregation

Answer 46

aka the law of purity of gametes.The two members of a pair of factors separate during the formation of gametes. They do not blend but segregate or separate into different gametes. The gametes combine together by random fusion at the time of zygote formation

Question 47

Law of Independent Assortment

Answer 47

When there are two pairs of contrasting characters, the distribution of the members of one pair into the gametes is independent of the distribution of the other pair.