Give five points.
What is the difference between hetrozygous conditions and homozygous conditions.
Answers
Individual organisms carrying two identical alleles (for example RR or rr) are called as homozygous. While individual organisms bear different alleles (for example Rr) are called heterozygous.
A homozygous trait is when the same kind of two alleles associate to form a trait. A heterozygous is a trait when different kinds of two alleles associate to form a trait. In this type, dominant and regressive alleles are present in the pair, and the dominant will represent the kind of trait the offspring will show.
As humans are diploid organisms, containing two copies of every chromosome, which inherit a complete set of chromosomes from their mother and a complete set from their father. These two chromosomes which correspond to each other are called homologous chromosomes. Even the locus (location) is same of these genes in homologous chromosomes.
For example, here we are talking about hair colour and let’s consider that we have two alleles for this gene – one allele codes for black hair colour (R) and the other allele codes for brown hair colour (r).
The homologous pairs of chromosomes consist of either same alleles (both black or brown) or different alleles (black and brown). On the basis of these possible outcomes, we can differentiate whether they are same alleles, i.e. homozygous or different alleles i.e. heterozygous.
Explanation:
Homozygous means that both copies of a gene or locus match while heterozygous means that the copies do not match. Two dominant alleles (AA) or two recessive alleles (aa) are homozygous. One dominant allele and one recessive allele (Aa) is heterozygous.