# data[].attributes.headline
Is it the male or the female that determines the sex of the offspring?- explain

# data[].attributes.subject
Is it the male or the female that determines the sex of the offspring?- explain

# data[].attributes.headline
Why do some families have all girls when there should be a 50% split

# data[].attributes.subject
Why do some families have all girls when there should be a 50% split

# data[].attributes.headline
Why do the results of a punnet square not always reflect real life offspring ratios

# data[].attributes.subject
Why do the results of a punnet square not always reflect real life offspring ratios

# data[].attributes.headline
How can you work out a recessive trait from a pedigree chart?

# data[].attributes.subject
How can you work out a recessive trait from a pedigree chart?

# data[].attributes.body
Sex is inherited from the male. The males sex chromosomes are X and Y and after meiosis 50% of the sperm/gametes will carry an X and 50% will carry a Y chromosome. The females ova always carry an X chromosome since the female is XX. Depending on which sperm (X or Y) fertilises the X carrying egg, the offspring will either be XX (female or XY (male).