Question

What are Homozygous and Heterozygous alleles ?? ​

Answer 1

Answer:

Homozygous is a genetic condition where an individual inherits the same alleles of a gene from both the parents. Heterozygous is a genetic condition where an individual inherits different alleles of a gene from the two parents. Genotype representation.

Explanation:

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Answer 2

ANSWER :-

There is no such thing as "Homozygous and heterozygous alleles".

The correct question here instead should be about the homozygous and heterozygous genotypic combinations that the alleles of a particular character produce.

Definition of "allele" to resolve your confusion :-

Alleles are defined as the variable forms of a single character that are present at the same locus on the two chromosomes present in a homologous pair.

Example- T for tall and t for dwarf in the context of height of progeny.

Now, Homozygous and Heterozygous are the two of the few types of genotypic combinations that are studied under the topics related to genetics.

The differences between these terms are listed below-

Homozygous :-

• Homozygous combinations of genes constitute genotypes that are made up of wild, original, non mutated, dominant alleles only.
• Homozygous combinations are found in the progeny that are produced as a result of pure breeding or true breeding or genetic selfing of pure-line parents.
• The progeny produced through pure breeding are referred to as "Pure-line individuals".
• Examples of homozygous combinations are as follows-

1. In the context of height, TT (Homozygous tall) and tt (Homozygous dwarf).
2. In the context of colour of flowers, RR (Homozygous red) WW (Homozygous white).

Heterozygous :-

• Heterozygous combinations of genes constitute of genotypes that are made up of a mixture of both, wild, original, non mutated, dominant genes, and mutated, recessive alleles.
• Heterozygous combinations are found in the progeny that are produced as a result of impure breeding or genetic crossing of pure-line parents.
• Only the wild, original, non mutated, dominant allele is able to express itself in phenotypes of such genotypic combinations.
• Examples of heterozygous combinations are as follows-

1. In the context of height, Tt (Heterozygous tall), heterozygous combinations can never produce dwarf plants.
2. In the context of eye colour Bb (Brown eyes), heterozygous combinations can never produce blue eyes.