Non-Mendelian Genetics Part 1: Incomplete Dominance In radishes, the gene that controls color exhibits incomplete dominance. Pure-breeding red radishes (RR) crossed with pure- breeding white radishes (rr) make purple radishes. What are the genotypic and phenotypic ratios when you cross a purple radish with a white radish? Genotype Probabilities: Phenotype Probabilities: Crosses between a yellow rat and a yellow rat always produce yellow rats (YY). Crosses between a white rat and a white rat always produce white rats (yy). But crosses of a white with a yellow produce a cream rat. What are the genotype and phenotype ratios if you cross two creams? Genotype Probabilities: Phenotype Probabilities: Part 2: Co-dominance In chickens, Black feathers (B) are co-dominant with White feathers (W). The hybrid is checkered. Cross a checkered chicken with a black chicken to determine the possible phenotypes for the baby chicks. Possible phenotypes: In cattle, red fur (R) is co-dominant with white fur (W). The heterozygote is roan (red & white spots). Cross a roan cow with a roan bull to determine the possible phenotypes for the calves. Possible Phenotypes: Cross: Cross: Cross: Cross:

Human Anatomy & Physiology (11th Edition)
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Chapter1: The Human Body: An Orientation
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Non-Mendelian Genetics
Part 1: Incomplete Dominance
In radishes, the gene that controls color exhibits incomplete
dominance. Pure-breeding red radishes (RR) crossed with pure-
breeding white radishes (rr) make purple radishes. What are the
genotypic and phenotypic ratios when you cross a purple radish
with a white radish?
Genotype Probabilities:
Phenotype Probabilities:
Crosses between a yellow rat and a yellow rat always produce
yellow rats (YY). Crosses between a white rat and a white rat
always produce white rats (yy). But crosses of a white with a
yellow produce a cream rat. What are the genotype and
phenotype ratios if you cross two creams?
Genotype Probabilities:
Phenotype Probabilities:
Part 2: Co-dominance
In chickens, Black feathers (B) are co-dominant with White
feathers (W). The hybrid is checkered. Cross a checkered chicken
with a black chicken to determine the possible phenotypes for the
baby chicks.
Possible phenotypes:
In cattle, red fur (R) is co-dominant with white fur (W). The
heterozygote is roan (red & white spots). Cross a roan cow with a
roan bull to determine the possible phenotypes for the calves.
Possible Phenotypes:
Cross:
Cross:
Cross:
Cross:
Transcribed Image Text:1 Name Non-Mendelian Genetics Part 1: Incomplete Dominance In radishes, the gene that controls color exhibits incomplete dominance. Pure-breeding red radishes (RR) crossed with pure- breeding white radishes (rr) make purple radishes. What are the genotypic and phenotypic ratios when you cross a purple radish with a white radish? Genotype Probabilities: Phenotype Probabilities: Crosses between a yellow rat and a yellow rat always produce yellow rats (YY). Crosses between a white rat and a white rat always produce white rats (yy). But crosses of a white with a yellow produce a cream rat. What are the genotype and phenotype ratios if you cross two creams? Genotype Probabilities: Phenotype Probabilities: Part 2: Co-dominance In chickens, Black feathers (B) are co-dominant with White feathers (W). The hybrid is checkered. Cross a checkered chicken with a black chicken to determine the possible phenotypes for the baby chicks. Possible phenotypes: In cattle, red fur (R) is co-dominant with white fur (W). The heterozygote is roan (red & white spots). Cross a roan cow with a roan bull to determine the possible phenotypes for the calves. Possible Phenotypes: Cross: Cross: Cross: Cross:
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