134k views
3 votes
The result of the following cross indicates the orange eyes are _____ black eyes. A cross between two aliens with black eyes. Their offspring have two phenotypes. 247 of them have black eyes, 86 of them are orange-eyed. The total number of the offspring is 333.

User Tennille
by
8.1k points

2 Answers

3 votes

Answer:

recessive

Step-by-step explanation:

did a punnet square

User Contradictioned
by
8.4k points
4 votes

Answer:

The result of the following cross indicates the orange eyes are recessive to black eyes

Step-by-step explanation:

According to Mendel, a cross involving two individuals that are heterozygous for a dominant trait will yield offspring in the phenotype ratio 3:1 with the dominant trait accounting for about 75% of the phenotype and the recessive trait accounting for the remaining 25%.

In this case, black eye colour phenotype is 247 while orange eye colour phenotype is 86.

Calculating the percentage for each trait

Black eye = 247/333 x 100% = 74.1%

Orange eye = 86/333 x 100% = 25.8%

74.1:25.8 is approximately 3:1

Hence, it is obvious that the orange eyes are recessive while the black eyes are dominant.

User Alidad
by
8.5k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.