What is a recessive feature?

The recessive feature is a feature caused by a recessive gene, which means that someone has to inherit two copies of the gene in order to show the property. On the other hand, the dominant feature requires only one copy of the gene. The concept of dominant and recessive properties in genetics was presented by Gregor Mendel, a 19th century scientist, who is often considered the father of genetics, thanks to his extensive work in the field. In the case of humans, genetic material is coded up to 46 chromosomes, 23 coming from each parent. Each chromosome contains a number of alleles or genes that code different information, from the color of the child's eyes to the way the legs develop. If a child inhyon or she is said to be heterozygous in this allele. When someone inherits the same allele twice, this feature shows whether it is dominant or not. But when someone is heterozygous, one of the alleles remains inactive and this allele represents a recessive feature.

grEgor Mendel has made a lot of his work with the peas. During his research, he learned that purple was the dominant feature of flower colors, which means that only one purple gene had to inherit the flower to create purple flowers. On the other hand, white was a recessive feature, so only peas that was homozygous with white in the allele of flower color would develop white flowers. For the abbreviation, he accepted the Convention on the use of capital letters to indicate the dominant properties and versions with lower letters that indicate the recessive, in this case in this case and p indicate the color of flowers.

The presence of recession explains why two parents can have dark hair, because the light hair gene is a recessive characteristics, and therefore would not be reflected in parents who had a dark hair gene. If both parents of the child carry dominant and recessive genes, there is 25% chance that the child will develop light hair, 50% chance that the baby will have dark hair when carrying allele for light hair and 25% chance that the baby will be homozygotous for dark hair.