Why is the ratio of male to female births roughly 50:50? help me please!!!
a) All egg cells carry an X chromosome.
b) All sperm cells carry an X chromosome.
c) Half of all egg cells carry a Y chromosome.
d) Half of all sperm cells carry a Y chromosome.
This is because of how reproduction works in humans. Male and female sex cells are formed by a process called meiosis, where the diploid chromosomes divide and separate. And so the ratio of male to female births is also 50:50.
