Please explain the terms "homozygous" and "heterozygous".?

Question

The terms "homozygous" and heterozygous" are to compare two chromosomes right? Not within the same one? And please explain these terms. Thank you very much.

Answer 1

Homozygous
An organism is referred to as being homozygous at a specific locus when it carries two identical copies of the gene affecting a given trait on the two corresponding homologous chromosomes (e.g., the genotype is PP or pp when P and p refer to different possible alleles of the same gene). Such a cell or such an organism is called a homozygote.

A homozygous dominant genotype occurs when a particular locus has two copies of the dominant allele (e.g. PP). A homozygous recessive genotype occurs when a particular locus has two copies of the recessive allele (e.g. pp).

Pure-bred or true breeding organisms are homozygous. For example a homozygous individual could have the allele combinations PP or pp. All homozygous alleles are either allozygous or autozygous.

Heterozygote
An organism is a heterozygote or is heterozygous at a locus or gene when it has different alleles occupying the gene's position in each of the homologous chromosomes. In other words, it describes an individual that has 2 different alleles for a trait. In diploid organisms, the two different alleles were inherited from the organism's two parents. For example a heterozygous individual would have the allele combination Pp

Answer 2

Define Heterozygous

Answer 3

Homozygous means that they are the same type, where as heterozygous and different. Homozygous are like have the chromosomes (A,A) but a heterozygous would be (A,a). "Homo"zygous have the same type next to themselves. Well thats the best I can explain.

Answer 4

Homozygous means the two alleles for a gene match.
Ex: BB or bb

Heterozygous means the two alleles for a gene are different.
Ex: Bb

Answer 5

Homozygous refers to having identical alleles for a single trait. Heterozygous means having two different alleles for a single trait.

Answer 6

Chromosomes, as you may have noticed, come in pairs. Zoom in to specific genes on those chromosomes. One standard example is that for sickle cell. Most of us produce a bunch of hemoglobin A, from two genes that program us to do so (AA). Homozygous. In sickle cell anemia, they're homozygous for SS. The other possibility is AS, one gene for each, or heterozygous, and that's sickle trait, which normally doesn't cause problems.

Answer 7

It is all about the traits.

Homozygous means you have identical alleles for a trait (like one dominant allele from each of your parents for a certain trait).

Heterozygous means you have different alleles for a trait (like one dominant allele from your father and one recessive allele from your mother for a certain trait).

Just remember homo=same and hetero=different.

Answer 8

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RE:
Please explain the terms "homozygous" and "heterozygous".?
The terms "homozygous" and heterozygous" are to compare two chromosomes right? Not within the same one? And please explain these terms. Thank you very much.

Answer 9

homozygous means the same(hh)and heterozygous means different (Hh).

Answer 10

homozygous as in female since she has two identical sex chrom XX
while male is hetro since he have XY !!
cheers