inheriting biological sex

Cards (9)

how many chromosomes do humans have? 
23 pairs (46)
why are chromosomes in pairs? 
chromosomes are in pairs as 1 chromosome is inherited from the mother and the other chromosome is inherited from the father.
what are the sex chromosomes for people born male? 
XY
what are the sex chromosomes for people born in females? 
XX
what is a zygote? 
a zygote is formed when a sperm and egg fuses.
what is a gamete? 
sex cells
which gametes decide the biological sex of an offspring? 
male gamete (sperm)
how many chromosomes does a gamete have? 
23
what is an allele? 
allele is a version of the same gene.