What does each parent give to there genes?

Answer 1

When an egg and a sperm "unite", they form a zygote, which has two gender chromosomes. However, eggs and sperm by themselves only have one. Eggs only ever have X chromosomes. Sperm can either have X or Y chromosomes. If an X sperm enters the egg, it will be XX or female. If a Y sperm enters the egg, it will be XY or male.

This isn't really taking into account chromosomal disorders such as XXY etc where things don't go quite as expected, but that's the basics of things.

It's pretty random which sperm will "win", there's no real way to determine that. I think studies have shown that in some families/men female sperm are dominant, or male sperm, so that families sometimes have a run of girls before having a boy, etc.

Answer 2

When a male and and a female 'mix up genes' they create an embrio that inherited the genes from there parents. The sperm and egg of the posterity's parents contain chromosomes (genes) that can combine to make the baby. Without the posterity's parents chromosomes, it cannot form an embrio that will eventually turn into a baby.

Answer 3

When the parents have sex, the mother's gamete has 23 chromosomes and the father's gamete has 23 chromosomes. Together they create a zygote which has 46 chromosomes.

These 46 chromosomes have traits from both parents and will both contribute to the child's features.

Answer 4

Each parent passes on half of their genetic material, or DNA to their offspring. The actual traits that the offspring will inherit depends upon which genes are passed on, the combination of those genes, and whether the genes are dominant or recessive.

Answer 5

Each parent provides approximately half or their genome to their children. This dictates a lot of their children's physical characteristics, although the way inherited traits are shown is very complex.

Answer 6

Half the number of chromosomes

Answer 7

2 parents