The expected phenotypic ratios are therefore 9 round and yellow: 3 round and green: 3 wrinkled and yellow: 1 wrinkled and green.įrom this, you can calculate the expected phenotypic frequencies for 100 peas: Phenotype If the two genes are unlinked, the probability of each genotypic combination is equal. To calculate the expected values, you can make a Punnett square. Step 1: Calculate the expected frequencies This would suggest that the genes are linked.Alternative hypothesis ( H a): The population of offspring do not have an equal probability of inheriting all possible genotypic combinations.
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