What could be the genotype of a garden pea plant that expresses tall trait of height?

1. TD

2. Tt

3. Td

4. tt

Genes which code for a pair of contrasting traits or slightly different forms of the same gene are known as:

1.Alleles
2. Loci
3. Cistrons
4. Introns

In 1900 Mendel’s work was rediscovered by:

The pure line round seeded pea plant was crossed with wrinkled seeded pea plant. The F1 generation is ____ and it can be explained by _____. (respectively)

1. Wrinkled : Law of segregation

2. Round : law of dominance

3. Round : Condominance

4. Wrinkled : Law of dominance

Which of the following is not true for the Law of Dominance given by Mendel?

If the offspring is aa, what possible combination of parental genotype would have produced these progenies?

(1) AA and aa

(2) Aa and AA

(3) aa and AA

(4) Aa and Aa

A pea plant parent having violet-coloured flowers with unknown genotype was crossed with a plant having white-coloured flowers. In the progeny, 50% were white. The genotypic constitution of the parent having violet-coloured flowers was

1. homozygous

2. merozygous

3. heterozygous

4. hemizygous

Types of gametes produced by a homozygous parent

(1) many

(2) single type

(3) depends upon number of genes

(4) depends upon number of chromosomes

If 'A' represents the dominant gene and 'a' represents its recessive allele, which of the following would be the most likely result in the first generation offspring when Aa is crossed with aa ?

1. All will exhibit dominant phenotype.

2. All will exhibit recessive phenotype. 

3. Dominant and recessive phenotypes will be 50% each.

4. Dominant phenotype will be 75%.

An organism with two different alleles is:

1. Homozygous for that trait
2. Homologous for the allele
3. Heterozygous for the trait
4. Heterologous for the allele