understand that fertilisation involoves the fusion of a male and female gamete to produce a zygote that undergoes cell division and develops into an embryo
fertilisation
adult male + female. cells have complete number of chromosomes (diploid. 2n)
in human male they divide in testis in human female in ovary to produce gametes which are haploid (n) only have 23 chromosomes instead of usual 46.
in sexual reproduction the egg and sperm (haploid gametes) join/fuse to form 1 cell called the zygote. this process is called fertilisation. (n+n=2n>>hapliod+haploid=diploid) 23+23=46
then zygote undergoes mitosis (cell division). all contain all 46 chromosomes. 2n. diploid. once many have formed the mass of celles is known as an embryo.
fertilisation
adult male + female. cells have complete number of chromosomes (diploid. 2n)
in human male they divide in testis in human female in ovary to produce gametes which are haploid (n) only have 23 chromosomes instead of usual 46.
in sexual reproduction the egg and sperm (haploid gametes) join/fuse to form 1 cell called the zygote. this process is called fertilisation. (n+n=2n>>hapliod+haploid=diploid) 23+23=46
then zygote undergoes mitosis (cell division). all contain all 46 chromosomes. 2n. diploid. once many have formed the mass of celles is known as an embryo.
No comments:
Post a Comment