inheritance, variance and survival 0.0 / 5 ? ScienceBiologyGCSENone Created by: o.addisCreated on: 21-04-18 15:50 what does the nucleus contain? chromosomes 1 of 13 what is a chromosome? they are long coiled up length of a molecule called DNA 2 of 13 what is DNA? it is a long list of chemical instructions on how to build an organism 3 of 13 what is a gene? it is a short section of a chromosome (and so a short section of DNA) 4 of 13 what do genes control? they control many of our characteristics e.g. hair colour, eye colour etc 5 of 13 what do genes work in? they work in pairs, one is normally dominant over the other 6 of 13 how many chromosomes do we have in our body? 46 (23 pairs) 7 of 13 what does the eggs nucleus fuse with during reproduction? when the egg is fertilised the nucleus of the egg fuses with the nucleus of the sperm 8 of 13 how do you inherit your parents characteristics? the fertilised egg develops into an embryo with a mixture of the parents characteristics 9 of 13 what is heredity? the process by which genes are passed down from the parents to their offspring 10 of 13 what is it called when all living things are different? a variation 11 of 13 what is a characteristic feature? any type of difference e.g. skin colour, height, weight 12 of 13 how do you get characteristic features? you can get these from inheriting them from your parents or they can be environmental (caused by your surroundings) 13 of 13
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