Viruses have not a nucleus, but they have viral DNA that they can transplant into other healthy cells to infect them.
What we can say about the frequency of x-linked recessive traits is that the frequency of the allele for the recessive x-linked traits is assumed to be equal to the proportion of males with the recessive phenotype.
Answer:
Haemoglobin (Hb) is a protein present in red blood cells that transports oxygen and gives blood its dark/vivid red color. The amount of haemoglobin in the blood varies from person to person. Men's levels are often greater than women's. This is scientifically proven however, it is often but not all the time.
