Cytogenetics Mock Test 8

10%

Question 1 of 10

1. Choose the wrong one out.

Incomplele dominance is the presence of haplosufficiency

Codominant genes are never haplosufficient

Dominant phenotype is expressed when a gene is haplosufficient

In homozygous condition an allele can express its phenotype be it the dominant or recessive allele in nature

Question 1 of 10

Question 2 of 10

2. What is the probability that the son of a color blind father would be color blind?

1/4

1/2

Question 2 of 10

Question 3 of 10

3. Which one of the following will not be expressed in female even in homozygous form?

Cock feathering

Cleft palate

Osteoporosis

Color blindness

Question 3 of 10

Question 4 of 10

4. A white and a black chicken give an egg. What is the probability of the progeny born being Andalusian?

1/2

1/4

1/6

Question 4 of 10

Question 5 of 10

5. If present of horn in a breed of sheep is due to the presence of h+ allele which is sex influenced and more expressed in male, choose the off one out.

Female with h h⁺

Male with h⁺ h⁺

Male with h h⁺

Female with h⁺ h⁺

Question 5 of 10

Question 6 of 10

6. Both Drosophila and mammals have XY system of sex determination. Dosage compensation y inactivation of one X chromosome is seen in ___________________

Telophase

Drosophila

Metaphase

Mammals

Question 6 of 10

Question 7 of 10

7. Which of the following is true about the attachment of sister chromatid to kinetochore in this phase?

The attachment is at centromere

Chromosomes bound by one spindle give negative signal to prevent cycle progression

Each chromosome is bound by 2 spindle fibers at the kinetochore

The sister chromatids seperate

Question 7 of 10

Question 8 of 10

8. The intersex is produced by ________________

Fusion of a male and female zygote

Gain of X or Y chromosome due to non-disjunction

Loss of X chromosome from some cells

Loss of Y chromosomes from some cells

Question 8 of 10

Question 9 of 10

9. In an experiment, you add the short arm of Y chromosome to a cell line with composition AA+ XX. What will you see?

The cell develop female character

The cell develop neuter gender character

The cell develop male character

The cell rejects the Y chromosome

Question 9 of 10

Question 10 of 10

10. Patterned baldness is a sex influenced trait more expressed in a male. If b+ is normal allele making non-bald phenotype and b is mutant leading to bald phenotype, for a cross between a bald mother and normal father, what is the probability of a bald son?

1/4

1/2

Question 10 of 10