9. Radishes may be long, round, or oval in shape and red, white, or purple in colour. A long white variety crossed with a round red one produced oval, purple Fi's. The F2 progeny of F1 selfing comprised nine phenotypic classes as follows: long, red long, purple oval, red oval, purple 32 round, red 9 long, white round, purple 16 8 15 19 round, white 8 oval, white 16 9 (a) Explain the pattern of inheritance. (b) Give the genotypic and phenotypic ratios expected among the progeny of crosses between: A long, purple and an oval, purple plant. An oval, purple plant and a round, white plant

A heterozygous tall yellow plant is crossed with a homozygous short green. What will be the genotypes 3. and phenotypes, and probabilities of the first generation? Genotype of the heterozygous tall, yellow plant Genotype of the homozygous short, green plant Genotypes Phenotypes Right handedness (R) is dominant over left (r) Browyn eves (B) are dominant over blue (b). A man who is blue eyed and right handed, whose father was left handed, married a left handed woman with brown eyes, whose mother was blue eyed. What are the possible phenotypes and genotypes of the offspring and the probability for each? 4. Genotype of the man Genotype of the woman Genotypes Phenotypes What is the probability of getting right handed offspring? What is the probability of getting blue eyed offspring? What is the probability of getting offspring heterozygous for both traits? What is the probability of getting offspring that are homozygous dominant?

A pureline plant of genotype Ab/Ab is crossed to another pureline plant aB/aB. The F1 hybrid is testcrossed. If both genes are closely linked with no crossover, what fraction of the progeny of this testcross will be double homozygous recessive? more than 25% O 0% O 25% less than 25% but higher than 0%

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