RECESSIVE INHERITANCE:
A person who carries a recessive allele but does not show this phenotype is known as a carrier for the particular trait/ characteristic. If both parents are carriers and decide to have children, then the kids may receive a defect allele from each parent. This means the children will be affected and the results contain homozygous recessive alleles.
The incidence in the population of severe recessive disorders that are not linked to a sex chromosome is reasonably low because its unlikely that a carrier from one family to another carrier with the same condition. Cystic fibrosis is a disorder controlled by one recessive allele. Children with the condition suffer chest infections, lack of digestive enzymes and an increased amount of salt loss throughout the body.
The incidence in the population of severe recessive disorders that are not linked to a sex chromosome is reasonably low because its unlikely that a carrier from one family to another carrier with the same condition. Cystic fibrosis is a disorder controlled by one recessive allele. Children with the condition suffer chest infections, lack of digestive enzymes and an increased amount of salt loss throughout the body.