Mendel obtained his initial pea plant varieties from local breeders who were developing new varieties that might be useful or interesting. To generate these new varieties, breeders formed hybrids between existing varieties of different phenotypic characteristics by cross pollination, using techniques they doubtless taught to Mendel. After producing a hybrid, they allowed several generations of self-pollination, as happens naturally if the flowers are not disturbed. a. How many generations would it take for a breeder to have produced new pure-breeding varieties using this approach? iv. What is the probability that an individual in each of these generations (F2, F3, and F10) would be homozygous for one or the other allele of this gene? [Broad hint: if they’re not heterozygous, they’re homozygous!
1. Mendel obtained his initial pea plant varieties from local breeders who were developing new varieties that might be useful or interesting. To generate these new varieties, breeders formed hybrids between existing varieties of different
a. How many generations would it take for a breeder to have produced new pure-breeding varieties using this approach?
iv. What is the probability that an individual in each of these generations (F2, F3, and F10) would be homozygous for one or the other allele of this gene? [Broad hint: if they’re not heterozygous, they’re homozygous!]
Introduction:
Mendel used Punnet squares during his experiments on pea plants. He used genetic characters like seed shape and seed color during his experiments during some of his crosses.
Pure breeding means the homozygous for the allele. Let's consider that breeders were crossing the varieties with local red and white flower pea plants. Let's suppose the gene which determined the flower color is R, and the dominant and recessive alleles of this gene are represented by R and r, respectively.
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