What does homozygous mean in biology?
two identical alleles
(HOH-moh-ZY-gus JEE-noh-tipe) The presence of two identical alleles at a particular gene locus. A homozygous genotype may include two normal alleles or two alleles that have the same variant.
What is the best definition for heterozygous?
Definition of heterozygous : having the two alleles at corresponding loci on homologous chromosomes different for one or more loci.
What is an example of a heterozygous genotype?
An organism with one dominant allele and one recessive allele is said to have a heterozygous genotype. In our example, this genotype is written Bb.
What is the difference between heterozygous and heterozygote?
Heterozygous. A diploid organism is heterozygous at a gene locus when its cells contain two different alleles (one wild-type allele and one mutant allele) of a gene. The cell or organism is called a heterozygote specifically for the allele in question, and therefore, heterozygosity refers to a specific genotype.
What is the meaning of heterozygous chromosome?
Heterozygous (and its less common form heterozygotic) means “relating to a cell that has two different alleles for a particular gene at corresponding positions on homologous chromosomes.”
What is an example of a homozygote?
Homozygous examples You can have brown eyes whether you’re homozygous (two alleles for brown eyes) or heterozygous (one for brown and one for blue). This is unlike the allele for blue eyes, which is recessive. You need two identical blue eye alleles in order to have blue eyes.
What happens if both parents are heterozygous?
If both parents are heterozygous (Ww), there is a 75% chance that any one of their offspring will have a widow’s peak (see figure). A Punnett square can be used to determine all possible genotypic combinations in the parents.
What does a carrier mean in biology?
Listen to pronunciation. (KAYR-ee-er) In classical genetics, an individual who carries one deleterious allele for an autosomal recessive disorder. In clinical discussions, may refer to an individual who carries a deleterious allele that predisposes to disease.
What does dominant mean in biology?
= Dominant refers to the relationship between two versions of a gene. Individuals receive two versions of each gene, known as alleles, from each parent. If the alleles of a gene are different, one allele will be expressed; it is the dominant gene. The effect of the other allele, called recessive, is masked.
What are the differences between heterozygous and homozygous?
Homozygous and heterozygous are two states of genotypes.
What is a simple definition of heterozygous?
By origin. Alleles differ by origin if they come from the same locus on different chromosomes.
What determines phenotype in a heterozygote?
Alleles and Genes. If playback doesn’t begin shortly,try restarting your device.
What is an example of a heterozygous trait?
What is an example of a heterozygous trait? Heterozygous means that an organism has two different alleles of a gene. For example, pea plants can have red flowers and either be homozygous dominant (red-red), or heterozygous (red-white).