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LECTURE SB015: 4.2 Deviation from Mendelian Inheritance

Total questions: 10

Worksheet time: 4mins

Name
Class
Date
1.

The Law of Independent Assortment is not applicable for

a)

dihybrid inheritance

b)

true breed individuals

c)

heterozygous genotypes

d)

linked genes

2.

A true-breed red flowered snapdragon is crossed with a true breed white flowered one. All of the F1 have pink flowers. What does this say about the parent traits?

a)

Alleles for red and white flower are codominant

b)

Allele for red flower is dominant

c)

Allele for white flower is dominant

d)

Allele for red flower shows incomplete dominance

3.

What is the possible phenotypic ratio of the children if the father has blood type AB the mother has blood type A with genotype IAi?

a)

All AB

b)

1 A : 1 B

c)

1 A : 1 AB

d)

2 A : 1 B : 1 AB

4.

Determine the sequence of genes A, B, C, and D if the distance from A-C is 17 units, A-B is 25 units, A-D is 37 units, B-C is 8 units and B-D is 12 units. The order would be as follows:

a)

A, B, C, D

b)

A, C, B, D

c)

D, C, A, B

d)

C, A, B, D

5.

In a Snapdragon plants, the allele for white flowers is recessive, while the allele for

red flowers shows incomplete dominance when they are in heterozygous form. What is the expected ratio of the offspring when to heterozygous pink flowering plant are crossed?

a)

1 red: 2 pink: 1 white

b)

3 pink: 1 red

c)

3 red : 1 white

d)

3 pink : 1 white

6.

This is an example of ___________?

a)

Incomplete dominance allele

b)

Codominant allele

7.

When one allele is not dominant over the other, resulting in both traits expressed in a heterozygous individual.....

a)

codominant allele

b)

incomplete dominant allele

c)

polygenes

d)

multiple alleles

8.

This type of inheritance pattern shows BOTH traits in possible offspring

a)

linked genes

b)

polygenes

c)

incomplete dominant allele

d)

codominant allele

9.

In Pisum sativum, the genes for purple colour flower (R) and round seeds (Q) are dominant over the genes for white colour flower (r) and wrinkled seed (q). Heterozygous were test crossed and the result are shown in the TABLE. Calculate the distance between flower colour and seed shape genes.

a)

17.36 map unit

b)

82.64 map unit

c)

46.53 map unit

d)

53.47 map unit

10.

In Drosophila, the locus for eye-colour is located on the X chromosome. The allele for red eye colour, R is dominant to white eyes, r. A white-eyed female fly mates with a red-eyed male fly. What is the percentage of the offspring to have white eyes?

a)

25%

b)

100%

c)

50%

d)

75%