Froggy Jumps Dihybrid Punnett Squares and Genetics FroggerOnline version punnett squares by John Middleton 1 Probability that the genotype ccdd will be produced by the parental cross CcDd x CcDd a 1/16 b 0 c 1/4 2 What is the Probability that the genotype Aa will be produced by the parental cross Aa x Aa? a 1/2 b 1/16 c 1/4 3 Probability that the genotype Rr will be produced by the parental cross Rr x rr a 1/2 b 1/16 c 3/4 4 What is the Probability that the genotype TTSs will be produced by the parents TTSs x TtSS a 1/4 b 1/16 c 1/2 5 Two plants are crossed, resulting in offspring with a 3:1 phenotypic ratio for a particular trait. What does this suggest? a parents were both heterozygous for a single trait b the parents were true-breeding for contrasting traits c shows incomplete dominance 6 In pea plants, homozygous recessive plants show the green phenotype. Two pea plants are both heterozygous for yellow pea pods (Y) and are crossed. What is the genotypic ratio for the offspring? a 1:2:1 b 2:2:1 c 1:1 7 In pea plants, homozygous recessive plants show the green phenotype. Two pea plants are both heterozygous for yellow pea pods (Y) and are crossed. What is the Phenotypic ratio for the offspring? a 3:1 b 1:1:1 c 2:1:1 8 A pea plant that is homozygous dominant for being tall and having green seeds (TTGG) is crossed with a short plant with white seeds (ttgg). What is the phenotype of the F1 generation? a TtGg b TTgg c Ttgg 9 A tall green pea plant (TtGg) is crossed with a tall green pea plant (TtGg), what is the phenotypic ratio of the offpring in the F1 generation? a 9:3:3:1 b 1:2:2:1 c 1:1:1:1 10 A couple has 5 children, all sons. If the woman gives birth to a sixth child, what is the probability that the sixth child will be a son? a 50:50 b 25% c 15%
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