Lubber grasshoppers are a large grasshopper characterized by a black body with red and yellow stripes. Red stripes are produced when the RR genotype is present, yellow stripes are produced when the rr genotype is present, and both red and yellow stripes are produced when the Rr genotype is present. If two red and yellow striped lubber grasshoppers produce offspring, what would the expected phenotypic ratio of the offspring be

3:1

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4:0

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1:2:1

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2:2:0

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3:0:1

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Solution

The correct option is C 1:2:1
The cross can be represented as shown in the figure.
Hence the phenotypic ratio is:
Red striped : 1
Red and Yellow striped : 2
Yellow striped : 1
So, the correct answer is '1:2:1'.

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The correct option is C 1:2:1The cross can be represented as shown in the figure. Hence the phenotypic ratio is:Red striped : 1Red and Yellow striped : 2Yellow striped : 1So, the correct answer is '1:2:1'.

The correct option is C 1:2:1
The cross can be represented as shown in the figure.
Hence the phenotypic ratio is:
Red striped : 1
Red and Yellow striped : 2
Yellow striped : 1
So, the correct answer is '1:2:1'.