lec03 - Picture 12 Lecture 3 Mendelian genetics I. Dihybrid...

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Picture 12 Lecture 3 – Mendelian genetics I. Dihybrid cross A. Cross B. Punnett square C. Branch Diagram 1. for genotype:            What’s the probability of  WWGG ?            What’s the probability of  WwGg ? 2. for phenotype:       What’s the probability of round, green?       What’s the probability of wrinkled, yellow? 1
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Picture 29 Picture 28 Picture 31 Picture 3 Picture 20 D. Dihybrid test cross – Consider F1 from previous example: What if cross unknown round,  yellow X wrinkled, green and get all  round, yellow? What if cross unknown round,  yellow X wrinkled, green and get 1/2  round yellow and 1/2 wrinkled, yellow? E. Does parental combination of alleles matter? II. Trihybrid cross A. Principles are same as for mono- or dihybrid cross B. Example: round, yellow, purple flower X wrinkled, green, white flower ( WWGGPP ) ( wwggpp ) F 1 round, yellow, purple flower ( WwGgPp ) 2
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lec03 - Picture 12 Lecture 3 Mendelian genetics I. Dihybrid...

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