When alleles of a gene pair are identical?

When the alleles of a gene pair identical they are said to be?

An organism in which the two copies of the gene are identical — that is, have the same allele — is called homozygous for that gene.

What is having identical pair of alleles?

homozygous. having the same allele at the same locus on both members of a pair of homologous chromosomes. Homozygous also refers to a genotype consisting of two identical alleles of a gene for a particular trait. An individual may be homozygous dominant (AA) or homozygous recessive (aa).

When would a pair of alleles be heterozygous?

When the two alleles are not identical, the pair is heterozygous. In contrast, an identical pair is homozygous. The traits actually expressed by a heterozygous pair of alleles depend on the relationship between the two alleles and possibly the effects of other genes.

Can alleles be identical or different for any given gene?

They can be identical or different for any given gene in a somatic cell. … They can represent alternative forms of a gene.

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What happens to the alleles of a gene pair?

The alleles are moved to different chromosomes. The alleles are mutated in the process of mitosis. The alleles are separated during fertilization. The alleles are separated during gamete formation.

What is an organism that has two identical alleles for a trait?

Genotypes are described as homozygous if there are two identical alleles at a particular locus and as heterozygous if the two alleles differ. Alleles contribute to the organism’s phenotype, which is the outward appearance of the organism. Some alleles are dominant or recessive.

What phenotype means?

The term “phenotype” refers to the observable physical properties of an organism; these include the organism’s appearance, development, and behavior. An organism’s phenotype is determined by its genotype, which is the set of genes the organism carries, as well as by environmental influences upon these genes.

What is the term heterozygous mean?

(HEH-teh-roh-ZY-gus JEE-noh-tipe) The presence of two different alleles at a particular gene locus. A heterozygous genotype may include one normal allele and one mutated allele or two different mutated alleles (compound heterozygote).

When would a pair of alleles be heterozygous quizlet?

An organism can be homozygous dominant, if it carries two copies of the same dominant allele, or homozygous recessive, if it carries two copies of the same recessive allele. Heterozygous means that an organism has two different alleles of a gene.

What is an example of a heterozygous allele?

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). If they have white flowers, then they are homozygous recessive (white-white).

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What is an example of a heterozygous pair of traits?

If the two versions are different, you have a heterozygous genotype for that gene. For example, being heterozygous for hair color could mean you have one allele for red hair and one allele for brown hair. The relationship between the two alleles affects which traits are expressed.