Geneticsproblemsworksheet

Geneticsproblemsworksheet - will have free earlobes? A...

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Dominant traits Recessive traits Freckles (F) No freckles (f) Can roll tongue (R) Can’t roll tongue (r) Widow’s peak hairline (W) Straight hairline (w) Free earlobes (E) Attached earlobes (e) Pointed eyebrows (B) Smooth eyebrows (b) Pointed eyebrows (B) are dominant over smooth eyebrows (b). Mary’s father has pointed eyebrows, but she and her mother have smooth. What is the genotype of the father? In rabbits, brown coat color is dominant over white. What is the genotype of a white rabbit? (use the letters B and b) What is the genotype of a brown rabbit? Crossing a brown rabbit with a white rabbit can solve the genotype ambiguity. Draw the Punnett squares for both possibilities. A man and a woman who have freckles produce a child who has no freckles. What is the genotype of the child? What is the genotype of the father? What is the genotype of the mother? Blake has free earlobes, but his wife Nancy, and their son, Frank, have attached earlobes. If Blake and Nancy have another child, what is the probability that he or she
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Unformatted text preview: will have free earlobes? A woman has widows peak hairline, but she does not know her genotype. She marries a man who has a straight hairline and they have 13 children. Nine have widows peaks and four have straight hairlines. What are the genotypes of the parents? What are the genotypes of the children? In radish plants, the shape of the radish may be long (LL), round (ll), or oval (Ll). If oval is crossed with oval, what proportion of the offspring will also be oval? Bryce is a carrier of sickle-cell anemia (he does not have the disease, but carries one copy of the defective allele). If he marries a woman who is not a carrier, could any of their children have the disease? What if he marries a woman who is a carrier? Sandra discovers that her mother has Huntingtons disease. What are the chances that she has it also? Sandras brother Jack gets a genetic screening test that determines he does not have the Huntingtons gene. Does this change Sandras odds?...
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This note was uploaded on 04/15/2011 for the course BIOL 101l taught by Professor Huddleston,m during the Fall '08 term at University of Hawaii, Manoa.

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Geneticsproblemsworksheet - will have free earlobes? A...

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