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Human Heredity 11th Edition by Michael Cummings
Edition 11ISBN: 978-1305251052Human Heredity 11th Edition by Michael Cummings
Edition 11ISBN: 978-1305251052 Exercise 13
Stem length in pea plants is controlled by a single gene. Consider the cross of a true-breeding long-stemmed variety to a true-breeding short-stemmed variety in which long stems are completely dominant.
A) If 120 F1 plants are examined, how many plants are expected to be long stemmed? Short stemmed?
B) Assign genotypes to both P1 varieties and to all phenotypes listed in (a).
C) A long-stemmed F1 plant is self-crossed. Of 300 F2 plants, how many should be long stemmed? Short stemmed?
D) For the F2 plants mentioned in (c), what is the expected genotypic ratio?
A) If 120 F1 plants are examined, how many plants are expected to be long stemmed? Short stemmed?
B) Assign genotypes to both P1 varieties and to all phenotypes listed in (a).
C) A long-stemmed F1 plant is self-crossed. Of 300 F2 plants, how many should be long stemmed? Short stemmed?
D) For the F2 plants mentioned in (c), what is the expected genotypic ratio?
Explanation
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b. The two parent plants (P1) are mentio...
Human Heredity 11th Edition by Michael Cummings
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