Stacey and Rishi are expecting fraternal twins, a boy and a girl. Stacey and Rishi have normal vision, but both of their fathers are colour vision deficient (CVD, a X-linked recessive trait). a) Draw a pedigree for their family b) Complete a Punnett square to show the cross between Stacey and Rishi. c) What is the probability that the baby will be a girl with CVD? d) What is the probability that the baby will be a boy with normal vision?

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A: Genotype is defined as the genetic constituents of an individual.

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Q: What is cross-matching?

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Q: How many distinct phenotypes will a AaBbCc x aaBBCc cross have?

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Q: Why can a person carrying a translocation be normal except for theinability to have children?

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A:

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Q: What is the difference between X-linked dominant and X-linked recessive traits?

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Mitochondrial Mutations

A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.