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Human Reproduction & Genes (DNA packaging (histone proteins…
Human Reproduction & Genes
gamete
sex cell
carry info
coded chemical characteristics
zygote
fertilised egg
50/50 male/female DNA
DNA packaging
DNA tightly coiled
3m in length
histone proteins
chromosomes
1 coil of DNA
genes placed end to end
DNA info stored in nucleous
meiosis
process for cell divison
allows DNA to be passed on in sperm/ova
cells
somatic
2 full sets of each chromosone
diploid
maternal chromosome
paternal chromosome
meiosis process
only one copy of chromosome pair
called the haploid