ength, and seed shape were three characteristics that Mendel studied. Each is co

Question

ength, and seed shape were three characteristics that Mendel studied. Each is controlled by an independently assorting gene and has dominant and recessive expression as follows: 20. Flower position, stem l Flower position: Stem length: Seed shape: axial (A) tall (T) round (R) terminal ( dwarf (t) wrinkled (r) If a plant that is heterozygous for all three characteristics is allowed to self-fertilize, what percentage of the offspring would you expect to be as follows? Note: use the rules of probability instead of a Punnett square.) a. homozygous for the 3 dominant traits b. homozygous for the 3 recessive traits c. heterozygous for all 3 traits d. homozygous for axial and tall, heterozygous for seed shape

Explanation / Answer

a) Homozygous for the 3 dominant traits - AATTRR

The percentage of offspring with AATTRR genotype is - 1/64 fraction or 1.56%

b) Homozygous for the 3 recessive traits - aattrr

The percentage of offspring with aattrr genotype is - 1/64 fraction or 1.56%

c) Heterozygous for all 3 traits - AaTtRr

The percentage of offspring with AaTtRr genotype is - 1/8 fraction or 12.5%

d) Homozygous for axial and tall, heterozygous for seed shape - AATTRr

The percentage of offspring with AATTRr genotype is - 1/32 fraction or 3.12 %

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