Crohnâs disease is usually treated with some medications but if complications occur, surgery may be an option to remove the most affected part of the colon or to close a fistula. Ulcerative colitis: Itâs an inflammatory disease that affects the large intestine and rectum only.
If the phenotype associated with a given version of a gene is observed when an individual has only one copy, the allele is said to be autosomal dominant. The phenotype will be observed whether the individual has one copy of the allele (is heterozygous) or has two copies of the allele (is homozygous).f the phenotype associated with a given version of a gene is observed only when an individual has two copies, the allele is said to be autosomal recessive. The phenotype will be observed only when the individual is homozygous for the allele concerned.
How genotype affects phenotype. The term âgenotypeâ is usually used to refer to specific alleles. Alleles are alternative forms of the same gene that occupy the same location on a chromosome.At any given locus, there are 2 alleles (1 on each chromosome in the pair) â you get 1 allele from your mother and 1 from your father.f the alleles are the same (TT or tt), the genotype is homozygous. If the alleles are different (Tt) the genotype is heterozygous. It is actually rare that 1 gene determines 1 characteristic as in the case of PTC tasting (a monogenic trait).