E2 - E1. Pea plants are relatively small and hardy. They...

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E1. Pea plants are relatively small and hardy. They produce both pollen and eggs within the same flower. Since a keel covers the flower, self-fertilization is quite easy. In addition, cross-fertilization is possible by the simple manipulation of removing the anthers in an immature flower and later placing pollen from another plant. Finally, peas exist in several variants. E2. The experimental difference depends on where the pollen comes from. In self-fertilization, the pollen and eggs come from the same plant. In cross-fertilization, they come from different plants. E3. Two generations would take two growing seasons. About 1 and 1/2 years. E4. According to Mendel’s law of segregation, the genotypic ratio should be 1 homozygote dominant : 2 heterozygotes : 1 homozygote recessive. This data table considers only the plants with a dominant phenotype. The genotypic ratio should be 1 homozygote dominant : 2 heterozygotes. The homozygote dominants would be true- breeding while the heterozygotes would not be true-breeding. This 1:2 ratio is very close to what Mendel observed. E5. In a monohybrid experiment, the experimenter is only concerned with the outcome of a single trait. In a dihybrid experiment, the experimenter follows the pattern of inheritance for two different traits. E6. All three offspring had black fur. The ovaries from the albino female could only produce eggs with the dominant black allele (because they were obtained from a true-breeding black female). The actual phenotype of the albino mother does not matter. Therefore, all offspring would be heterozygotes ( Bb ) and have black fur. E7. The data are consistent with two genes (let’s call them gene 22 and gene 24) that exist in two alleles each, a susceptible allele and a resistant allele. The observed data approximate a 9:3:3:1 ratio. This is the expected ratio if two genes are involved, and if resistance is dominant to susceptibility.
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E2 - E1. Pea plants are relatively small and hardy. They...

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