Answer:
d. 1/2
Explanation:
According to this question, PKU (Phenylketonuria) is a recessive condition in humans. A normal human must possess at least a dominant allele in the gene.
In a situation where two normal parents produce a child with PKU. This means that both parents are heterozygous for the condition i.e Pp × Pp. Hence, the heterozygous male (Pp) will produce gametes in the following proportion: P (1/2) and p (1/2).
This means that the probability that a sperm from the father will contain the PKU allele (p) is 1/2 or 50%
Answer: Spleen
Explanation:
The Spleen is an organ situated above the stomach and carry out important functions for body defence. This functions include:
- destruction of old red blood cells
- elimination of wastes such as dead platelets from the bloodstream
- storage of newly formed platelets.
A. Direct evidence
Hope that helps you out
