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B6 pt 1 (meiosis (gametes are produced by meiosis (gametes have one copy…
B6 pt 1
meiosis
when the cell starts to split it doubles in genetic info
gametes are produced by meiosis
gametes have one copy of chromosomes
to make gametes have half of what they have they split by meiosis
the pairs are then pulled apart
in the second division they line up in the centre
then when they split you get four gametes gentetically different
DNA
genes
genes are small sections of dna
they come from our parents
determine what we look like
tell cells what order to go in
genome
the entire set of genetic material
understanding genomes is crucial to science and medicine
this is because it can see if specific genes carry illnesses or conditions
Chromosomes
Dna stands for deoxyribonucleic acid
chromosomes contain genetic information
come in 23 pairs
polymer shape known as a double helix
Reproduction
sexual reproduction
where dna from the parents are fused together in the making of the off spring
the sperm and egg come together to mix dna
asexual reproduction
asexual reproduction happens by mitosis
one parent so the offspring is identical to the parent