Solved step by step with explanation-Genetic Cross Progeny Types

Question

Solved step by step with explanation-Genetic Cross Progeny Types

In a three-point test cross, three linked gene loci are being analyzed to determine their relative positions on a chromosome. The given genetic configuration involves the following mutations and linkage arrangement:

1. Scarlet Eye (sc): Mutation affecting eye color, let's label it as gene A.

- Ebony body mutation (e) is in repulsion. This means it is on the homologous chromosome to the one with sc ss.

Now, let's determine the least common three-point test cross progeny types based on the given information:

- Abc (repulsion chromosome)

The expected gametes from the triple mutant male would be: abc

abc | ABCabc | Abcabc

```

1. Wild-type eye color, wild-type bristles, and wild-type body color (ABCabc).

2. Wild-type eye color, spineless bristles, and ebony body color (Abcabc).