Five different forces have influenced human evolution are natural selection, random genetic drift, mutation, population mating structure, and culture.
Answer:
The portion of urethra that passes through the center of the prostate gland is called prostatic urethra.
Explanation:
Prostatic Urethra:
- Prostatic urethra, about 2.5 to 3cm long, is the widest and most dilatable part of the urethra.
This is because maybe that allele for the trait is recessive and the person is heterozygous.
If the person is heterozygous, it means that they have both the dominant and recessive allele for a trait. And by dominant and recessive, if dominant allele exists, no matter if recessive allele exists or not, the characteristic controlled by the dominant allele must be shown. This is their phenotype, which is the observable characteristics.
For example, there are 2 alleles for controlling the eye color. Brown allele is dominant, while blue is recessive. Just like the question above, if the person has an allele for blue eye color, but they have the brown color allele too, their phenotype would be brown eye color, as the brown color is dominant over blue eye color. This matches the requirements of having the allele for a particular trait but not showing the phenotype of that.
