Genetics 2 Online Test

When AABbCC are selfed, what is the phenotypic segregation ratio in F2 generation?
9:3:3:1
3:1
27:9:9:3:3:3:1
1:1
Which of the following is responsible for unwinding DNA double helix structure?
Topoisomerase
DNA gyrase
DNA ligase
DNA polymerase
Sex of the child is determined by
male chromosome
female chromosome
size of egg
size of sperm.
A hemophilic man marries a normal homozygous woman. What is the probability that their son will be haemophilic?
100%
75%
50%
0%.
Which one is an example of polygenic inheritance in man?
Sickle cell anaemia
Skin colour
Colour blindness
Phenylketonuiria.
Both sickle cell anemia and Huntington's chorea are
Virus-related diseases
Bacteria-related diseases
Congenital disorders
Pollutant-induced disorders
Hemophilia is more commonly seen in human males than in human females because
A greater proportion of girls die in infancy
This disease is due to a Y-linked recessive mutation
This disease is due to an X-linked recessive mutation
This disease is due to an X-linked dominant mutation
Which of the following is not a hereditary disease ?
Cystic fibrosis
Thalassaemia
Haemophilia
Cretinism
If a plant with 'Aa' genotype is crossed with “aa the progeny will be in
1: 1
3 : I
I : 2:1
9:3:3:1
A particular trait which is dominant in male if in the next experiment is carried on in female such cross is called
back cross
test cross
reciprocal cross
none of the above crossed with 'aa' the progeny will
All the members of F1 generation normally express
recessive trait
dominant trait
intermediate trait
both 'a' and b
Removal of anthers before maturity from a flower is called
anthesis
Emasculation
Antherosis
male sterilization
Chromosomal theory of inheritance was given by
Sutton and Boveri
Morgan
Darwin
Correns
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Description:

Genetics is a field of biology that deals in heredity and variation in living things. All living things inherit different traits from their parents . The idea is being used since prehistoric times to improve crops and animals through selective breeding. Modern genetics was set into action with the work of Gregor Mendel from the mid-nineteenth century. The physical basis for heredity as we know now are the units of inheritance called genes.

Discussion

afzana

thnku so much

4114 days 10 hours 49 minutes ago

DIVYACS

as we know genetics importance this test is so valuable sir''

4143 days 11 hours 50 minutes ago

naeem akhtar

thank u so much sir this test is more conceptual than other test.so nice of u

4148 days 13 hours 18 minutes ago

Dr. SUBROTO BISWAS
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