How to take Viagra. Viagra works best if it s taken approximately one hour before sexual activity. To get an erection, you will need to be sexually stimulated. Doctors usually recommend taking 50 mg once per day, but the dosage can be decreased to 25 mg or increased to 100 mg if needed.
Recessive allele: an allele that only has an effect on the phenotype when present in the homozygous state. Codominant alleles: pairs of alleles that both affect the phenotype when present in a heterozygote. Locus: the particular position on homologous chromosomes of a gene.Homozygous: having two identical alleles of a gene. Heterozygous: having two different alleles of a gene. Carrier: an individual that has one copy of a recessive allele that causes a genetic disease in individuals that are homozygous for this allele.ocus: the particular position on homologous chromosomes of a gene. Homozygous: having two identical alleles of a gene. Heterozygous: having two different alleles of a gene. Carrier: an individual that has one copy of a recessive allele that causes a genetic disease in individuals that are homozygous for this allele.
A gene or allele (an allele is the individual copy obtained from the parent) is a set of instructions used by the body to produce proteins. So, although we talk about genes being dominant or recessive, the reason is actually in the protein. There are numerous reasons why one may be dominant or recessive. One is that a protein results in an absence of something. That protein will be recessive, because its trait won't be evidenced unless the allele from the other parent is identical. Eye color is an example.