Discussion Section michelle wk 5

# How many ways you can have 1 child with albinism if

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specific term/situation (Ex. How many ways you can have 1 child with albinism if there are 5 kids total) NOTE: this can change, depending on what you are asking Ex. What is the probability of having the last two have albinism? o Factorial Equation: t s b a t s n P = ! ! ! n = number of individuals s = number of individuals with recessive phenotype t = number of individuals who are normal/wildtype QUESTIONS: 13) In cucumbers, orange fruit color ( R ) is dominant over cream fruit color (r). A cucumber plant homozygous for orange fruits is crossed with a plant homozygous for cream fruits. The F1 are intercrossed to produce the F2. a) Give the genotypes and phenotypes of the parents, the F1, and the F2. Give the ratios. b) Give the genotypes and phenotypes of the offspring of a backcross between the F1 and the orange parent. Give the ratios. c) Give the genotypes and phenotypes of a backcross between the F1 and the cream parent. Give the ratios. 25) In a family of seven children, what is the probability of obtaining the following numbers of boys and girls?

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BICD 100 Genetics – Ghiara Spring 08 Week5 a) All boys b) All children of the same sex c) Six girls and one boy d) Four boys and three girls e) Four girls and three boys 26) Phenylketonuria (PKU) is a disease that results from a recessive gene. Two normal parents produce a child with PKU.
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• Winter '08
• Nehring
• Genetics, alkaptonuria, recessive allele Homozygous, Ghiara Spring, curl tongue Tt

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