When the two genes for a trait are different?

Different versions of a gene are called alleles. Alleles are described as either dominant or recessive depending on their associated traits. Since human cells carry two copies of each chromosome? they have two versions of each gene?.

What does it mean when two genes are heterozygous?

​Heterozygous

= Heterozygous refers to having inherited different forms of a particular gene from each parent. A heterozygous genotype stands in contrast to a homozygous genotype, where an individual inherits identical forms of a particular gene from each parent.

What is two identical genes for the same trait?

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). Individuals who are homozygous for a trait are referred to as homozygotes.

What is a codominant gene?

Codominance is a relationship between two versions of a gene. Individuals receive one version of a gene, called an allele, from each parent. If the alleles are different, the dominant allele usually will be expressed, while the effect of the other allele, called recessive, is masked.

Is II homozygous or heterozygous?

What is the difference between heterozygous and homozygous expression of genes?

Homozygous: You inherit the same version of the gene from each parent, so you have two matching genes. Heterozygous: You inherit a different version of a gene from each parent.

What makes a trait polygenic?

​Polygenic Trait

A polygenic trait is one whose phenotype is influenced by more than one gene. Traits that display a continuous distribution, such as height or skin color, are polygenic.

Which is an example of a Y linked trait?

Hypertrichosis of the ears, webbed toes, and porcupine man are examples of Y-linked inheritance in humans. Hypertrichosis of the ears (or hairy ears) is a condition wherein there is a conspicuous growth of hair on the outside rim of the ear.

What are linked genes?

Linked genes sit close together on a chromosome, making them likely to be inherited together (left). Genes on separate chromosomes are never linked (center). But not all genes on a chromosome are linked.

How are polygenic traits different from traits that only require 2 genes?

8) How are polygenic traits different from traits that only require 2 genes? The polygenic traits have a wide variation in each trait. … The children can have more tall genes than either parent. The environment also plays a role in the expression of traits.

Are polygenic traits on the same chromosome?

Polygenic traits are traits that are controlled by multiple genes instead of just one. The genes that control them may be located near each other or even on separate chromosomes.

What is polygenic traits give 2 examples?

In humans, height, skin color, hair color, and eye color are examples of polygenic traits. Type-2 diabetes, coronary heart disease, cancer, and arthritis are also deemed as a polygenic. However, these conditions are not just genetic since polygenes can be influenced by environmental factors.