Cross #2: Wild body colored, red-eyed male X Ebony, white-eyed female offspring:

Question

Cross #2: Wild body colored, red-eyed male X Ebony, white-eyed female offspring: 49 Wild body colored, red-eyed females: 53 Wild body colored, white-eyed males 1. (7 points) Predict the following for these parents Circle one: Monohybrid Dihybrid Circle one for Ebony Body Color: Autosomal Dominant Autosomal Recessive Sex-Linked Dominant s Recessive Circle one for White Eye Color: Autosomal Dominant Autosomal Recessive Sex-Linked Dominant Sex-Linked Recessive Cross: Punnett square: Genotypic Ratio: Phenotypic Ratio:

Explanation / Answer

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WHITE EYED FEMALE

female parent must be homozygous

because she has the recessive white-eyed phonotype.

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male parent is hemizygous, red-eyed.

49 wildly body coloree redy eyed females 53 wildly body colored white eyes males

All of the females are red-eyed and heterozygous.

All of the males are white-eyed and hemizygous.

Answer

cross

monohybrid

ebony body

autosomal recessive trait.

For white eye

Sex -linked, recessive

Wildly body coloured red eyes male X EBONY

49 wildly body coloree red eyed females 53 wildly body colored white eyes males

P generation        

X-w

X-w

X-+,

X-w X-+,

body coloree red eyed females

X-w X-+,

body coloree red eyed females

Y

X-w Y

body colored white eyes males

X-w Y

body colored white eyes males

Ratio =1:1

49 wildly body colored red eyed females

53 wildly body colored white eyes males

cross

monohybrid

ebony body

autosomal recessive trait.

For white eye

Sex -linked, recessive

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