Question

page(s) 136 - 137 7.3. illustrate mendels laws of segregation and independent assortment. a breeder of ornamental koi fish breeds two red - eyed fish with long fins. the fry (baby fish) that hatch include 19 red - eyed, long - finned fish, 6 black - eyed, long - finned fish, 5 red - eyed, short - finned fish, and 2 black - eyed, short - finned fish. which of the following statements accurately describes inheritance of these traits in koi? accurate the red - eyed trait is dominant. one of the parents was homozygous recessive. the law of independent assortment describes how these two traits are inherited. the long - finned trait is recessive. both parents were heterozygous. the law of segregation describes how these two traits are inherited.

Explanation:

1. Red - eyed trait: Since two red - eyed fish produce both red - eyed and black - eyed offspring, red - eyed is dominant. Let \(R\) be the red - eyed allele and \(r\) be the black - eyed allele. The parents are \(Rr\) (heterozygous) as they can produce the recessive black - eyed (\(rr\)) offspring.
2. Long - finned trait: Two long - finned fish produce short - finned offspring, so long - finned is dominant. Let \(L\) be the long - finned allele and \(l\) be the short - finned allele. The parents are \(Ll\) (heterozygous).
3. Law application: Since we are dealing with two different traits (eye color and fin length), the law of independent assortment applies as the inheritance of one trait does not affect the inheritance of the other.

Answer:

The red - eyed trait is dominant.
Both parents were heterozygous.
The law of independent assortment describes how these two traits are inherited.