Question

You identify a rare purple-plumed parrot. When you cross the parrot to a true breeding white parrot, you get ½ white and ½ purple parrots. When you cross two purple parrots you get ⅓ white parrots and ⅔ purple parrots. Which of the following best explains this result? The purple allele is lethal in the homozygous state The purple allele is lethal in the heterozygous state White is dominant to purple The white allele is lethal in the homozygous state

Name: you identify a rare purple plumed parrot when you cross the parrot to a true breeding white parrot you get 12 white and 12 purple parrots when you cross two purple parrots you get 13 white p 70874
Uploaded: 2022-05-16T12:10:33-08:00
Duration: 2 min 41 s
Channel: Sri K
Description: you identify a rare purple plumed parrot when you cross the parrot to a true breeding white parrot you get 12 white and 12 purple parrots when you cross two purple parrots you get 13 white p 70874

          You identify a rare purple-plumed parrot. When you cross the parrot to a true breeding white parrot, you get ½ white and ½ purple parrots. When you cross two purple parrots you get ⅓ white parrots and ⅔ purple parrots. Which of the following best explains this result?
The purple allele is lethal in the homozygous state
The purple allele is lethal in the heterozygous state
White is dominant to purple
The white allele is lethal in the homozygous state

Added by Lisa D.

Biology for AP Courses

Julianne Zedalis, John Eggebrecht

Instant Answer

Solved by Expert Sri K

05/16/2022

Step 1

The true-breeding white parrot is WW. The rare purple-plumed parrot must be heterozygous Pw (but we’ll denote purple allele as P and white as w; since white is recessive, WW is white and P is the purple allele that can be lethal in PP). Show more…

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You identify a rare purple-plumed parrot. When you cross the parrot to a true breeding white parrot, you get ½ white and ½ purple parrots. When you cross two purple parrots you get ⅓ white parrots and ⅔ purple parrots. Which of the following best explains this result? The purple allele is lethal in the homozygous state The purple allele is lethal in the heterozygous state White is dominant to purple The white allele is lethal in the homozygous state