7.2 Non-mendelian Genetics

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This image is an example of: codominance, dominance, incomplete dominance

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incomplete dominance

Front

A breed of chicken shows codominance for feather color. One allele codes for black feathers, another codes for white feathers. The feathers of heterozygous chickens of this breed will be:

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speckled black and white

Front

Identify the correct genotypes for red, white, and speckled carnations in codominance.

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Red = RR, white = WW, speckled = RW

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What type of inheritance does this image represent? Options: incomplete dominance, codominance, polygenic inheritance, complete dominance

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codominance

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A red flowered plant (RR) breeds with a White flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have pink (RW) flowers?

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100%

Front

A roan cow shows codominance in fur color (brown and white). What is the phenotype ratio expected in offspring when a female roan and a male roan mate together?

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1 Brown: 2 Brown and White: 1 White

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When one allele is not dominant over another, resulting in a blended phenotype for heterozygous offspring is considered...

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Incomplete Dominance

Front

Cross a red flower (RR) with a speckled flower (RB). What is the phenotypic ratio?

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2 red, 2 speckled

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Cross two speckled flowers (RB) in codominance. Possible outcomes: 1 red, 2 speckled, 1 blue; 2 red, 2 blue; 2 blue, 2 speckled; 1 red, 1 speckled, 2 blue.

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1 red, 2 speckled, 1 blue

Front

Which genotype represents a female who is a carrier for hemophilia? Options: X^HX^h, X^hX^h, X^HX^H, X^hY

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X^HX^h