13. Mendelian Genetics

The F₁ generation differed from the F₂ in Mendel's experiments in that __________.

In Mendel's monohybrid cross of purple-flowered and white-flowered peas, all members of the F₁ generation had the __________ phenotype because their genotype was __________ at the flower-color locus.

If a heterozygous plant is allowed to self-pollinate, what proportion of the offspring will also be heterozygous?

Which of the following properties were present in the characters that Mendel examined in his breeding experiments?

The smooth feathers on the back of the neck in pigeons can be reversed by a mutation to produce a 'crested' appearance in which feathers form a distinctive spike at the back of the head. A pigeon breeder examined offspring produced by a single pair of non-crested birds and recorded the following: 22 non-crested and 7 crested. She then made a series of crosses using offspring from the first cross. When she crossed two of the crested birds, all 20 of the offspring were crested. When she crossed a non-crested bird with a crested bird, 7 offspring were non-crested and 6 were crested. Which allele is dominant?