Question

How do mice inherit the sepia eye color trait?

Answer 1

Sepia eye color in mice is associated with a mutation in the Tyrp1 gene, which affects the production or function of pigments in the eyes. The sepia trait is inherited through genetic factors following Mendelian principles, with the specific mode of inheritance determined by the nature of the mutation. The mutation leads to altered melanin production, resulting in the characteristic sepia eye color.

Answer 2

Sepia eye color in Drosophila is determined by multiple genes, including autosomal genes, and typically requires two copies of the recessive sepia allele for the trait to be exhibited. This eye color mutation is not linked to the X chromosome and affects both sexes equally.

Step-by-step explanation:

The inheritance of sepia eye color in Drosophila, also known as fruit flies, is a genetic trait controlled by multiple genes. These genes determine eye color and are located on different chromosomes, including the X chromosome and autosomes. For instance, the gene for red eye color, which is the wild-type phenotype, is dominant over the white eye color gene. Since the sepia eye color gene is not X-linked, both male and female Drosophila can be homozygous or heterozygous for the sepia trait. Genetic crosses in Drosophila can result in various phenotypic ratios depending on the alleles carried by the parent flies.

When it comes to sepia eye color in Drosophila, typically, eye color mutants such as sepia are autosomal and recessive. For a fly to display sepia eyes, it would need to inherit two copies of the sepia allele (one from each parent if the trait is autosomal). The exact mode of inheritance for sepia eyes would depend on the specific genetic pathways and interactions with other genes involved in eye pigment production. In general, Drosophila eye color inheritance has been extensively studied since Thomas Hunt Morgan's groundbreaking work in the early 20th century, revealing complex genetic interactions.