Variation and genetics – Online MCQs Test – Biology MCAT

1. Basic units of inheritance are:

Genes

Nucleolus

Nucleus

Chromosomes

2. Incomplete dominance is also known as:

Dependent Inheritance

Intermediate inheritance

Primary Inheritance

Secondary Inheritance

3. Each gamete contains only one allele of a particular character and is said to be pure, this

Law of Segregation

Plelotropy

Epistasis

Law of Independent Assortment

4. The result obtained from mono hybrid cross is spoken as

Single trait inheritance

Inheritance of two traits

Intermediate lnhentance

Test Cross

5. In Erythroblastosis foctalis:

Mother and father both are Rh negative

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

Father is Rh positive and mother Rh negative

Mother is Rh positive and father Rh negative

6. Suppressive influence of any genetic factor on another that is not its allele is:

Co dominance

Incomplete Dominance

Test Cross

Epistasis

7. Erythroblastosis fetalis is characterized by the symptom of:

Jaundice

Heart problem

Fever

Death of baby

8. The blood group without antigen is:

9. 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.

10. Acquiring of information about the phenotypes of family members to infer the genetic nature of a trait from the pattern of its inheritance is:

Chromosomal analysis

Paternal analysis

Maternal analysis

Pedigree analysis

11. II an organism has TtRr genotype, then which of the following gametes does not follow law of independent assortment?

12. Rh stands for:

Rhesus Gene

Rhesus Heamatin

Rhesus Factor

Rhesus Pool

13. When round and wrinkled were crossed, it gave all round. This round is:

F3 generation

F1 generation

P1, generation

F2 generation

14. Traits that are controlled by two or more than two separate pairs of genes, which manifest themselves in an additive fashion to yield continuously varying traits, this is:

Polygenic Inheritance

Epistasis

Pleiotropy

Intermediate Inhertiance

15. Mutual exchange of segments of chromosomes is called:

Synapsis

Linkage

Pleiotropy

Crossing over

16. None of the two genes is dominant over the other, this phenomenon is:

Test Cross

Epistasis

Incomplete dominance

Co-dominance

17. The genotype of a dog can be best determined by:

Back cross

Reciprocal cross

Crossing over

Test cross

18. Law of Dominance was derived by:

Rudolf Virchow

Gregor Johann Mendell

Bateson

T. H. Morgan

19. The human female possesses a genotype of:

40 + XY

42 + XX

44 + XY

40 + XX

20. Variations are produced due to:

Locus

Mutation

Allele

Gene

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