Answer:
C. His mother carried at least one allele for that trait
Explanation:
-Men have a single allele of each gene on the X chromosome, inherited from their mother, and a single allele of each gene on the Y chromosome, from their father.
-A sex-linked trait is a trait that is controlled by a gene or an allele located on the sex chromosome.
-X-linked traits are maternally inherited from carrier mothers or from an affected father. Each son born to a carrier mother has a 50% probability of inheriting the X-chromosome carrying the mutant allele.
Plants use nitrogen for <u><em>making protein</em></u> since proteins are rich in it because of the amino group of the amino acids.
A) Cell wall (animal cells don't have these structures)
Transportation is the cells way of brining in and expelling molecules, ions, et cetera. This is useful because a cell can receive what it needs at all times via transport but also have the ability to rid the cell of unnecessary molecules that aren't needed.
