A fruit fly has black eyes. Having red eyes is a dominant trait (R) and having black eyes is a recessive trait (r). Which describes the fruit fly’s genotype and phenotype? genotype: black eyes phenotype: Rr genotype: black eyes phenotype: rr genotype: rr phenotype: black eyes genotype: Rr phenotype: black eyes
Answers
Answer:
Since red eye color is dominant over green and long wings are dominant over short, the parents are homozygous for these recessive traits. The genotype of a parent with short-winged, green-eye is llrr and that of a long-winged, red-eyed fly is LlRr. The ratio of red and green-eyed progeny is 1:1 and likewise, the ratio of progeny with short and long wings is also 1:1. A cross between heterozygous dominant and homozygous recessive gives 1 dominant: 1 recessive progeny. This means the parent fly with long-wings, red-eyes is heterozygous for eye color and wing length.
Answer:
Since red eye color is dominant over green and long wings are dominant over short, the parents are homozygous for these recessive traits. The genotype of a parent with short-winged, green-eye is llrr and that of a long-winged, red-eyed fly is LlRr. The ratio of red and green-eyed progeny is 1:1 and likewise, the ratio of progeny with short and long wings is also 1:1. A cross between heterozygous dominant and homozygous recessive gives 1 dominant: 1 recessive progeny. This means the parent fly with long-wings, red-eyes is heterozygous for eye color and wing length.
Explanation: