What phenotypes and genotypes would appear in the testcross progeny if there is never any crossing over between Gl2 and Wt1

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.

the correct answer is option d.

an appositive is a noun, noun phrase or noun clause which follows another noun or noun phrase in order to describe it or name it another way. they are usually used between commas, brackets or dashes.

the example sentence with the correct use of commas is the following:

her uncle, the man over there in the red shirt, owns the hardware store in town.