IGCSE Biology Revision - Part 14.2 - Chromosomes, Genes & Proteins

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This video covers haploid & diploid nuclei and inheritance of sex in humans.

-Josephine. :D
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I'm in year 8 and wanna become a GP doctor. Should I do extra research on diseases and stuff that doctors know like why we get spots OR just concentrate on Biology classes in school. Thanks

lfcrags
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What happens to the uterus lining if the women is pregnant. Does it fall off or does it maintain.

lfcrags
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Why is there a blood supply in the finger. Why do bones need to have oxygen. I thought only muscles respire so why do bones need it. And the bones for example in your fingers receive oxygenated blood from the heart and then veins from the fingers take deoxygenated blood back. Why does the blood lose oxygen. I thought there aren't any muscles in the hands. So why does my arm have veins that are deoxygenated. Why would our fingers use oxygen.

lfcrags
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You made a mistake at the end and mixed up haploid and diploid nuclei, im not sure, I'm asking

nikkinyarko