Question

Define Dominance and recessive traits.

Answer 1

Hint: In ecology, the word dominance is used to describe an animal or plant species that exerts the most control on other species in its group since its members are the most abundant or the largest.
In animal behaviour, the dominant animal in a social grouping is defined as dominant.

Complete Answer:
- Dominance, in genetics, has a greater effect on one of the pairs of genes (alleles) that affect the same inherited character. If the individual pea plant with alleles T and t (T = height, t = shortness) is the same height as the individual TT, the T allele (and the height trait) is said to be fully dominant. If the T t individual is shorter than the T but still taller than the t individual, T is said to be partially or incompletely dominant; i.e. it has a greater impact than t but does not fully hide the presence of t, which is said to be recessive.

A recessive trait is a trait that is expressed when the organism has two recessive alleles or genotypes. Features of species that can be observed include physical characteristics such as hair and eye colour, as well as characteristics that may not be readily evident, such as the form of the blood cells.
- Any organism that organises its DNA into chromosomes has two alleles, one from its mother and one from its parent. Alleles can be dominant or recessive.Dominant alleles mask the effects of recessive alleles, because the recessive phenotype is expressed only when the organism has two recessive alleles for the gene.

Note: Some diseases are autosomal recessive, including cystic fibrosis, Tay-Sachs disease, and sickle cell anaemia. Autosomal means that it is caused by a recessive gene located in one of the chromosomes that is not a sex chromosome (i.e. not located on X or Y chromosomes). Some other disorders are X-linked recessive. They are located on the X chromosome and are more common in males since males have only one X chromosome. Color Blindness, haemophilia, and Duchenne muscular dystrophy are examples of recessive X-linked disorder.