Which pair of alleles is heterozygous?

What are heterozygous alleles?

Listen to pronunciation. (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).

Which is an example of a heterozygous pair?

A gene pair having different alleles in the two chromosome sets of the diploid individual for example, Aa or, A1A2.

What are heterozygous alleles example?

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.

What allele pair is 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.

Which of these 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.

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Is AA heterozygous or homozygous?

If an organism has two copies of the same allele, for example AA or aa, it is homozygous for that trait. If the organism has one copy of two different alleles, for example Aa, it is heterozygous.

What are some examples of a homozygous?

Homozygous examples

  • Eye color. The brown eye color allele is dominant over the blue eye allele. You can have brown eyes whether you’re homozygous (two alleles for brown eyes) or heterozygous (one for brown and one for blue). …
  • Freckles. Freckles are tiny brown spots on the skin. …
  • Hair color. Red hair is a recessive trait.

Is HH heterozygous or homozygous?

Half the possible offspring will be homozygous, HH, and half will be heterozygous, Hh.

What is homozygous allele?

(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.

Is YY homozygous or heterozygous?

YY is the homozygous dominant genotype (2 Y alleles). The phenotype of this genotype is yellow seed color. Yy is the heterozygous genotype (one dominant allele, one recessive allele).