A Level biology – Sex linkage
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A red-eyed male Drosophilia melanogaster and a white-eyed female are interbred. They produce 32 red-eyed female and 29 white-eyed male offspring. What is the best explanation for these results?CorrectIncorrect
The human X chromosome codes for around 900 polypeptides, and the Y chromosome codes for around 60 polypeptides. How many more genes are their on the X chromosome compared to a Y chromosome?CorrectIncorrect
Haemophilia is a sex-linked disorder. What would the phenotypes of parents be if the probability of their offspring having the disorder are: 0% if they are female; 50% if they are male?CorrectIncorrect
Two heterozygous yellow mice are cross-bred. Over 3 years they produce 48 yellow mice and 25 agouti (brown) mice. What is the most likely explanation for this observation?CorrectIncorrect