Principles Of Inheritance Mock Tests

16 questions available

Principles Of Inheritance Mock Test 1

Questions: 16

Sample Questions

Class 12 Biology

Molecular diseases in humans include:

A Sickle cell anaemia and phenylketonuria (PKU)

B Down syndrome and Turner syndrome

C Haemophilia and colour blindness

D Cystic fibrosis and muscular dystrophy only

Class 12 Biology

Mendel's law of independent assortment is based on which type of cross, and what does it state?

A Dihybrid cross — alleles of different genes segregate independently during gamete formation

B Monohybrid cross — dominant alleles always mask recessive alleles

C Dihybrid cross — alleles of the same gene segregate during gamete formation

D Test cross — recessive parent reveals the genotype of the dominant parent

Class 12 Biology

Bateson and Punjabi discovered linkage in Snapdragon (Mirabilis jalapa) when they observed that the frequency of parental combinations in a dihybrid cross was significantly higher than the expected 9:3:3:1 ratio. This happens because:

A The genes are located on the same chromosome and tend to be inherited together

B The genes show incomplete dominance instead of complete dominance

C The alleles are located on the X chromosome only

D The genes are mutually exclusive in their expression

Class 12 Biology

In a cross between two heterozygous pea plants with round yellow seeds (RrYy x RrYy), the proportion of offspring with recombinant phenotypes (round green or wrinkled yellow) is:

A 6/16

B 9/16

C 3/16

D 8/16

Class 12 Biology

A dihybrid cross between two heterozygous pea plants (YyRr × YyRr) produces offspring in what phenotypic ratio:

A 9:3:3:1

B 3:1

C 1:2:1

D 1:1:1:1

Class 12 Biology

Two genes located very close together on the same chromosome are most likely to show which pattern of inheritance in a dihybrid cross:

A Strict linkage with very few or no recombinant offspring

B Independent assortment producing a 9:3:3:1 ratio

C Sex-linked recessive inheritance pattern

D Incomplete dominance with intermediate phenotypes

Class 12 Biology

In a cross between two individuals with genotype IᴬIᵇ and Iᴬi, how many different genotypes and phenotypes are expected among the offspring respectively:

A 4 genotypes and 3 phenotypes

B 3 genotypes and 4 phenotypes

C 4 genotypes and 4 phenotypes

D 3 genotypes and 3 phenotypes

Class 12 Biology

In Snapdragon (Mirabilis jalapa), crossing a red-flowered plant (WW) with a white-flowered plant (ww) produces pink-flowered F1 offspring. Self-pollinating the F1 produces F2 with a phenotypic ratio of 1:2:1 (red:pink:white). This is an example of:

A Incomplete dominance, where the F1 phenotype is intermediate and the F2 phenotypic and genotypic ratios are both 1:2:1

B Complete dominance, where the red allele completely masks the white allele

C Codominance, where both alleles are fully expressed simultaneously in the heterozygote

D Sean linkage, where the alleles are located on the same chromosome

Comments

No comments yet. Be the first to share your thoughts!