Question

1. The presence of short hairs on the leaves of tomato plants is a dominant trait controlled by the allele H.The corresponding recessive trait, smooth leaf, is found in plants with the genotype hh. The table below shows the progeny of three independent crosses of parental plants with genotypes and phenotypes that are unknown. Number of Progeny Hairy Leaf Smooth Leaf Cross 1: Cross 2: Cross 3: 32 42 45 24 Examine the distributions of phenotypes in the progeny of each cross, and determine the parental genotypes for each cross. Use a Punnett square to diagram Cross 1. 2. In a mammalian Species, long fur and the appearance of white spots are produced by dominant alleles Fand S, respectively, which are found at two independently assorting loci. At these loci, the genotype ff produced short fur, and the genotypess produces solid fur color. Given the parental genotypes for each of the following crosses, determine the expected proportions of all progeny phenotypes Male FFSS ffss FfSs Female Ffss Cross 1: Cross 2: Cross 3: FfSs 3. In the fruit fly Drosophila, a rudimentary wing called "vestigial" and dark body color called "ebony" are inherited at independent loci and are recessive to their dominant wild-type counterparts, full wing and gray body color. Dihybrid wild-type males and females are crossed, and 3200 progeny are produced. How many progeny flies are expected to be found in each phenotypic class? 4. Albinism, lack of pigmentation in humans, results from an autosomal recessive gene (a). Two parents with normal pigmentation have an albino child. What is the probability that their next three children will be albino?

Answer 1