Variation and genetics – Online MCQs Test – Biology MCAT

1. The total aggregate of genes in a population at any one time is called the populations

Gene pool

Gene square

Gene target

Gene cycle

2. Blood group A can be donated to:

All of the above

3. When a colour blind male marries a normal female:

All sons are colour blind & daughters normal but carriers.

All the daughters will be colour blinds & sons normal but cariers.

All the sons, will be normal & daughter colour blind.

All the sons and daughters will be colour blind.

4. Mendel found that the F1 always resembled either one of the parents and that the trait of the other parent was not seen in them. This is due to

Unit factor

Partial dominance

Dominance

Segregation

5. Blood group, also known as “UniversaI Donor” is:

Blood group B-

Blood group O+

Blood group AB+

Blood group A+

6. Mendelian recombination’s are due to:

Independent assortment of characters

Modifications

Mutation

Linkage

7. In pleiotropy:

One gene interferes the effect of the other gene

One gene affects two or more traits

One gene dominates the other gene

One gene hides the effect of the other gene

8. Regarding colour blindness, “when a normal male marries carrier female”, which is the correct statement?

All sons will be colour blind

All daughters are normal but carriers

All daughter will be colour blind

Half of the sons will be colour blind

9. Test cross is a cross between

F1 hybrid with recessive parent

Two F1, hybrids

None of these

F1 hybrid with dominant parent

10. In Erythroblastosis foctalis:

Father is Rh positive and mother Rh negative

Mother is Rh positive and father Rh negative

Mother and father both are Rh negative

Mother and father are both Rh positive but grand parents are Rh negative

11. The polygenic character is:

Tall/dwarf

Diabetes

Round/wrinkle

Human height

12. X and Y-chromosomes are called:

Sex chromosomes

Pseudosomes

Monosomes

Autosomes

13. Genes that occupies a specific position called:

Linkage

Gene pool

Alleles

Locus

14. Incomplete dominance is also known as:

Primary Inheritance

Secondary Inheritance

Intermediate inheritance

Dependent Inheritance

15. In monohybrid cross the allele do not show any blending and that both the characters are recovered as such in F2 generation. This statement is explained on the basis of

Dominance

All of these

Segregation

Independent assortment

16. Number of chromosomes present in Male Grasshopper:

?23

17. Which of the following condition represents a case of co-dominant genes?

Genes that are similar in phenotypic effect, when present separately, but when together interact to produce different unit

A gene expresses itself suppressing the phenotypic effect of its alleles, when present in Heterozygous condition.

Alleles both of which interact to produce a trait which mayor may not resemble either of the parental types

Alleles, each of which produces an independent effect in a heterozygous condition

18. The blood group without antibody is:

19. Mendel’s law of segregation states that.

Two different traits will be inherited independently of each other

Gametes are produced by meiosis

All of the above

Two factors for the same trait separate in the production of gametes

20. Erythroblastosis fetal is can occur if marriage occurs between

B & D are correct

Rh- male, Rh- female

Rh+ male Rh- female

Rh+ male Rh+ female

Variation and genetics / inheritance-Medical College Admission Test Preparation Notes