Biology Inheritance Mcqs Test Online Punjab Boards 12th Class

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Question 1 of 15

Biology

1. Investigators do a dihybrid cross between two heterozygous and get about a 3:1 ratio among the offspring. The reason must be due to:

1.Pleiotropic genes

2.Linked genes

3.Polygenes

4.Epistatic gene

Question 1 of 15

Question 2 of 15

2. All chromosomes other than sex-chromosomes are called:

1.Polysome

2.Mesosome

3.Autosome

4.Lysosome

Question 2 of 15

Question 3 of 15

3. A man who has types B blood and a woman who has type A blood could have children of which of the following phenotypes?

1.AB or O only

2.AB only

3.A, B, AB or O

4.A or B only

Question 3 of 15

Question 4 of 15

4. Mendel’s law of independent assortment can be demonstrated by:

1.Test cross

2.Dihybrid cross

3.Back cross

4.Monohybrid cross

Question 4 of 15

Question 5 of 15

5. If a man of M blood group marries a woman of N blood group all their children will have:

1.M blood group

2.MN blood group

3.N blood group

4.O blood group

Question 5 of 15

Question 6 of 15

6. A heterozygous red-eyed female Drosophila mated with a white-eyed male would produce:

1.Red-eyed females and white males in the F₁

2.White-eyed- females and red eyed males in the F₁

3.Half red and half white-eyed female as well as male in the F₁

4.All white-eyed females and half red and half white eyed males in the F₁

Question 6 of 15

Question 7 of 15

7. All the offspring of a white hen and a black rooster are grey. The simplest explanation for this pattern of inheritance is:

1.Independent assortment

2.Incomplete dominance

3.Linkage

4.Sex linkage

Question 7 of 15

Question 8 of 15

8. When mothers anti-RH negative antibodies seep through placenta into blood circulation of foetus they start ________ of RBC of the foetus.

1.Haemolysis

2.Plasmolysis

3.Crenation

4.Deplasmolysis

Question 8 of 15

Question 9 of 15

9. Blood group in human beings are controlled by:

1.3 alleles in which A is recessive

2.4 alleles in which A is dominant

3.3 alleles in which A and B are co-dominant and I is recessive

4.3 alleles in which none is dominant

Question 9 of 15

Question 10 of 15

10. Albinsim is a recessive gene. A woman with albino father marries as albino man, the proportion of her progeny is:

1.2 normal: 1 albino

2.All albino

3.1 normal: 1 albino

4.All normal

Question 10 of 15

Question 11 of 15

11. Genes located on same locus bit having different expressions are:

1.Polygenes

2.Multiple alleles

3.Oncogenes

4.Condominants

Question 11 of 15

Question 12 of 15

12. Rh blood group system is encoded by three genes C, D and E which occupy ________ tightly linked loci:

1.Three

2.Five

3.Two

4.Four

Question 12 of 15

Question 13 of 15

13. Phenomena of an allele of one gene suppressing the activity of allele of another gene is called:

1.Dominance

2.Suppression

3.Inactivation

4.Epistasis

Question 13 of 15

Question 14 of 15

14. If red eyed (dominant) fly is mated with white eyed (ressessive) fly, the ratio of red to white eyed in F₂ generation would be:

1.1:3

2.3:1

3.2:2

4.2:1

Question 14 of 15

Question 15 of 15

15. Whether an allele is dominant or recessive depends on:

1.Which chromosome it is on

2.Whether it is inherited from the mother or the father

3.Whether it shows expression in heterozygous state or not

4.How common the allele is relative to other alleles

Question 15 of 15

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