Dominant and Recessive Alleles

Q.

Recessive gene can express itself only in________.

1. both above conditions

2. none of these conditions

3. homozygous condition

4. heterozygous condition

Q.

If tall is dominant over short, then which of the following character will be expressed when both the dominant allele and recessive allele are present?

1. It is random

2. Tall

3. Short

4. Medium height

Q.

Suppose eye colour of humans is governed by one gene. If black eye colour is dominant over green eye colour, then which letter correctly represents the dominant allele and the recessive allele respectively?

1. G and B

2. g and B
   

3. B and b

4. b and g

Q.

________will express the recessive character or trait.

1. F2 generation

2. Both A and B

3. None of the above

4. F1 generation

Q.

In Mendel’s experiments, the $F_1$ progeny resembles one of the two parents. The trait that is not seen is

1. Recessive

2. Dominant

3. Wild

4. Superior

Q.

The traits which are expressed in an individual in every condition are the recessive traits.

1. False

2. True

Q.

The allele that is expressed in a heterozygous organism is the ______ allele.

1. dominant

2. recessive

3. singular

4. multiple

Q.

The dominant allele is represented by a lower case letter.

1. True

2. False

Q.

The plant capable of producing white flowers consists of more red flowers in number over white flowers. It indicates that

1. Red colour is recessive

2. Red colour is dominant

3. White colour is dominant

4. Both colours are dominant

Q.

The recessive genes located on the X-chromosome of humans are always

1. expressed in females

2. lethal

3. sub-lethal

4. expressed in males