In a species of the cat family, eye colour can be gray, blue, green or brown, and each colour is true breeding. In separate crosses involving homozygous parents, the following data were obtained: 5. Cross: P1 F1 F2 all green all green all green A % green : % gray green : % brown /16 green : /16 brown : 3/16 gray : /16 blue green x gray green x brown gray x brown C Explain this pattern of inheritance. (Refer to the number of loci controlling the trait, the number of alleles per locus and the dominance interaction between the alleles). a. b. Assign genotypes to (i) green and (ii) blue.

The cross AaBb x aaBB results in which of the following phenotypic ratios? 1:1 1:1:1:1 1:2:1 9:3:3:1

Explain the Limitations of two-point crosses

Red-flowering snapdragons are homozygous for allele R1. White-flowering snapdragons are homozygous for  a different allele (R2). Heterozygous plants (R1R2) bear pink flowers. What phenotypes should appear among first-generation offspring of the crosses listed? What are the expected proportions for each phenotype? a. R1R1 × R1R2 c. R1R2 × R1R2 b. R1R1 × R2R2 d. R1R2 × R2R

In peas, the yellow allele is dominant over the green allele. A plant with yellow peas was crossed to a plant with green peas. The resulting plants were 50% yellow and 50% green. What is the genotype of the parents in this cross? G/g xg/g OG/G x G/g G/Gxg/g Og/g *g/g OG/g x G/g

Answer pls

4) In tomatoes, round shape (R) is dominant to pear shape (r). A student crossed a plant that had round tomatoes with a plant that had pear-shaped tomatoes and obtained the data below. What are the genotypes of the plants that were crossed. Briefly explain your answer. Phenotype Number of Offspring Round tomatoes 36 Pear-shaped tomatoes 34

Dihydrid Cross

1. In guinea pig, fur color is determined by one gene, and fur length by another independently segregating gene. The black fur allele (B) is dominant to brown fur allele (b) and the short allele (S) is dominant to long fur allele (s). From progeny listed in the following table, provide the probable genotype for the parents of each cross. Phenotype of Progeny Black short black long brown short Parents Black short X Black short Black short X Brown long Black long X Black long 90 17 0 32 16 35 29 14 0 brown long 8 15 2. A mouse with the genotype BbccEeFf is mated with another mouse with BBCCEEFF genotype. What is the probability of obtaining the following genotype in the progeny? a. BBCcEeFF b. BbccEEFf C. BbccEeFF 12 3. Determine the type of gametes that are formed from the following individuals with the given genotype? A. AaBbCc B. AABBCc C. AABbCe

Draw a tree diagram of the cross and determine all possible offspring genotypes and at what frequency each will appear