Slide 1 / 9 Slide 2 / 9 1 Brown spots (B) are dominant over no spots (b). If a Bb individual is crossed with a BB individual resulting in 200 offspring, how many offspring will be heterozygous for the trait? Quantitative Review Answer Slide 2 (Answer) / 9 Slide 3 / 9 1 Brown spots (B) are dominant over no spots (b). If 2 In humans, having dimples (D) is dominant over a Bb individual is crossed with a BB individual not having dimples (d) and a cleft chin (C) is resulting in 200 offspring, how many offspring will dominant over a smooth chin (c). If a male and be heterozygous for the trait? female heterozygous for both genes have children, what percentage will have dimples and a smooth chin? Answer 100 Answer [This object is a pull tab] Slide 3 (Answer) / 9 Slide 4 / 9 2 In humans, having dimples (D) is dominant over 3 Colorblindness is a recessive x-linked trait. If a not having dimples (d) and a cleft chin (C) is colorblind female has children with a normal dominant over a smooth chin (c). If a male and male, what percentage of their male children will female heterozygous for both genes have be colorblind? children, what percentage will have dimples and a smooth chin? Answer Answer 18.75% [This object is a pull tab]
Slide 4 (Answer) / 9 Slide 5 / 9 3 Colorblindness is a recessive x-linked trait. If a 4 In humans, having a widow’s peak (W) is colorblind female has children with a normal dominant to not having a widow’s peak (w). If a male, what percentage of their male children will male with genotype Ww has children with a be colorblind? female with genotype ww, what percentage of offspring will not have a widow’s peak? Answer Answer 100% [This object is a pull tab] Slide 5 (Answer) / 9 Slide 6 / 9 4 In humans, having a widow’s peak (W) is 5 In pea plants, tall stems (T) are dominant to dwarf dominant to not having a widow’s peak (w). If a stems (t) and round seeds (R) are dominant to male with genotype Ww has children with a wrinkled seeds (r). In a TtRr x ttrr F 1 cross that female with genotype ww, what percentage of produces 500 F 2 plants, how many plants have offspring will not have a widow’s peak? dwarf stems and round seeds? Answer Answer 50% [This object is a pull tab] Slide 6 (Answer) / 9 Slide 7 / 9 5 In pea plants, tall stems (T) are dominant to dwarf 6 In guinea pigs, white coat color (b) is recessive to stems (t) and round seeds (R) are dominant to black coat color (B). If two heterozygotes are wrinkled seeds (r). In a TtRr x ttrr F 1 cross that crossed, what percentage of offspring will also be produces 500 F 2 plants, how many plants have heterozygous? dwarf stems and round seeds? Answer Answer 125 [This object is a pull tab]
Slide 7 (Answer) / 9 Slide 8 / 9 6 In guinea pigs, white coat color (b) is recessive to 7 White eyes in fruit flies is a recessive x-linked black coat color (B). If two heterozygotes are trait. If a carrier female is crossed with a wild type crossed, what percentage of offspring will also be male, resulting in 742 female and 760 male heterozygous? offspring, how many of the males will have white eyes? Answer 50% Answer [This object is a pull tab] Slide 8 (Answer) / 9 Slide 9 / 9 7 White eyes in fruit flies is a recessive x-linked 8 In a AaBbCc x AaBbcc cross, what percentage of trait. If a carrier female is crossed with a wild type offspring are homozygous recessive for all traits? male, resulting in 742 female and 760 male offspring, how many of the males will have white eyes? Answer Answer 380 [This object is a pull tab] Slide 9 (Answer) / 9 8 In a AaBbCc x AaBbcc cross, what percentage of offspring are homozygous recessive for all traits? Answer 12.5% [This object is a pull tab]
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