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

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

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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. 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. If you include more number of genes in the cross, a branched diagram will be easier to find progeny phenotype.

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Q. If you have an organism with the genotype Pp HH rr Ww this can be used as a parent in test cross for________

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Q. Considering a dihybrid cross, what is the probability of the progeny being heterozygous at both the alleles?

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Q. If you cross homozygous recessive short plant with heterozygous purple flower to heterozygous tall plant with heterozygous purple flower, what will be the expected phenotypic ratio?

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Q. Which of the following will be pure breeding for only one character?

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Q. The expected phenotypic ratio obtained by crossing the F1 generation in dihybrid cross would be?

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Q. Crossing 2 Andulasian fowls you get 10 white fowl. What will be the expected number of Andulasian fowls as progeny?

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Q. In a cross between wild type pure breeding recessive and heterozygous dominant trait, if 4 progeny are found to be expressing the dominant phenotype, what will be the expected number of recessive?

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Q. The F1 generation is determined by crossing P/P with p/p. Then the progeny obtained from them were intercrossed. What will be the ratio of pure breeding flowers to not pure breeding flowers in F2?

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Q. The back cross can distinguish heterozygotes from homozygotes as they give _________ phenotypic ratio respectively.

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Q. Which of the following is a test cross?

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