What is the difference between a homozygous individual and a heterozygous individual?

Answer 1

In genetics, homozygous genes are identical alleles, while heterozygous genes have different alleles. For example, TT(same alleles) is homozygous genotype, while Tt (different alleles) is a heterozygous genotype.

Answer 2

A homozygous individual carries two copes of the same allele for a particular gene, while a heterozygousindividual carries one copy of an allele and a copy of another. Consider a gene with only two alleles, A and a. The possible genotypes are as follows: Homozygous: AAaa Heterozygous: Aa
I used to have problems with memorizing this when I first started taking Biology and botany and zoology classes. Its simple.

Heterozygous means different

Homozygous means same

To remember think, HOMO means SAME.

Answer 3

Homozygous individuals have two of the same type of alleles, be it two dominant alleles or two recessive alleles for a given trait. Heterozygous individuals have one dominant and one recessive allele for a given trait.

Answer 4

From a genetics standpoint, homozygous and heterozygous refer to a pair of alleles.

If both alleles are "the same", either both dominant (TT) or both recessive (tt), then they are a homozygous pair of alleles. If one is dominant and one is recessive (Tt), they are a heterozygous pair.

Answer 5

Homozygous means the individual has two identical alleles for a trait.

Heterozygous means they have two different alleles.

BB or bb - Homozygous

Bb - Heterozygous

XrXr or XRXR - Homozygous

XrXR - Heterozygous

Answer 6

A fully homozygous individual could only pass one type of allele to it's offspring because the alleles on all paired chromosomes would be the same. This individual would have a genotype like this:
AABBccEEGGFFzz (note that all pairs of alleles are either dominant or recessive. A fully heterozygous individual would have a 50% chance of passing a dominant or recessive allele because none of the alleles at each locus would match. This individual would have a genotype like this:
AaBbCcEeGgFfZz.

Few, if any, individuals could have a completely homozygous or heterozygous genotype.

Answer 7

A homozygous individual has both alleles for a character either in dominant or in recessive condition whereas in heterozygous individual out of two alleles for a character one is dominant and the other is recessive. for example; RR or rr is homozygous and Rr is heterozygous condition in an individual for a particular character.

Answer 8

A homozygous genotype signifies that the alleles for a trait are the same (aa or AA). A heterozygous genotype signifies that the alleles are different (Aa).