Question

Differentiate between homozygous and heterozygous

Answer 1

Homozygous	Heterozygous
Diploid organisms carry two copies of each gene and if both the alleles are similar then it is called as homozygous.	Diploid organisms carry two copies of each gene and if both the alleles are different then it is called as heterozygous.
Homozygous individuals always result in same individuals. eg. alleles with XX, yy	Heterozygous individuals always have different alles. eg. Xx, Rr
Homozygous individuals carry either dominant or recessive alleles but not both at a time.	Heterozygous individuals carry both dominant and recessive allele at a time.
Only one type of gametes are produced. Also it does not show extra vigour.	Two types of gametes are produced. The individual shows extra vigour or heterosis.