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Starter Give three main causes of variation within a population Define the term ‘mutation’

Starter Give three main causes of variation within a population Define the term ‘mutation’ Can ‘skin cancer’ be inherited? Explain your answer. Give one advantage of mutation (hint: read the pages 30 & 31). Sex chromosomes X = Female Chromosome Y = Male Chromosome

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Starter Give three main causes of variation within a population Define the term ‘mutation’

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  1. Starter Give three main causes of variation within a population Define the term ‘mutation’ Can ‘skin cancer’ be inherited?Explain your answer. Give one advantage of mutation (hint: read the pages 30 & 31)

  2. Sex chromosomes X = Female Chromosome Y = Male Chromosome All female gametes (e.g. eggs) will contain an ‘X’ chromosome. Half of all male gametes (e.g. sperms) will contain an ‘X’ and half will contain a ‘Y’.

  3. Sex Determination X = Female Chromosome Y = Male Chromosome

  4. However, occasionally sperms carrying BOTH the ‘X’ and the ‘Y’ chromosomes areproduced. X + XY = XXY XXY is known as KlienfelterSyndrome

  5. Even sperms carrying no sex chromosome are produced X + nothing = X Just having an ‘X’ chromosome is known as Turner Syndrome

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