Q. In an organism you observe that phenotypes of the progeny are as – 315 H/H R/R, 108 H/-r/r, 101 h/h R/-, 32 h/h r/r. This shows_____

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Q. By crossing homozygous short purple flowering parent with a heterozygous tall purple flowering parent you get 41 tall progeny. What will be the expected number of short progenies?

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Q. What will be the dyhybrid ratio for a cross between HH TT with hh tt?

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Q. In an experiment with drosophila eye colour purple/red and wing shape normal/vestigial you observe that offspring mainly have either purple vestigial trait or red normal trait. What is the expected parental trait?

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Q. What is the probability that Aa BB Cc will form from the cross between Aa Bb Cc X Aa Bb Cc?

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Q. In F2 progeny you get 1:1 ratio represents two phenotypes, what will be the genotype of the parent?

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Q. In an experiment with snapdragon flowers you have 10 F1 flowers that are white. What will be the number of red flowers?

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Q. What is the probability of getting a recessive phenotype for all three gene locus for the cross Aa Bb Cc X aa Bb cc?

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Q. In case of rats the homozygous yellow allele is lethal. If you cross two yellow pats, what will be the ratio of white and yellow rats?

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Q. Which of the following crosses can never result in a recessive phenotype?

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Q. You know that H is dominant for height locus and H is recessive. Is the F2 progeny are a mixture of 3:1 dominant: recessive and you pick a dominant plant at random. What will be the probability that the F3 will have a mixture of dominant and recessive traits as well?

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Q. Two black female mice are coupled with a brown male mouse. If female A produces 4 black and 3 brown children and female B in its litter produces 10 black children, what is the genotype of A, B and male mouse respectively?

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Q. If a mother is a non tongue roller and Father is a tongue roller, whose father was a non- roller, what is the probability of having a roller daughter?

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Q. Consider a dyhybrid cross of AaBb with AaBb, how many of the offsprings will breed true?

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Q. In a dihybrid cross which of the following will be of the least occurrence?

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Q. What is the probability of getting a Red flower by crossing a pink and white snapdragon flower?

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Q. In bats the progeny with Qq die. If you cross two wild type bats which are homozygous for dominant and recessive form of the trait, what will be the expected ratio of the F1?

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Q. What is the probability of getting Aa Bb Cc from the cross aa BB cc X AA bb CC?

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