What can you use to measure dry material in science? and wet material in science. plz me

German cockroaches, bulging eyes, bu, are recessive to normal eyes, bu , and curved wings, cv, are recessive to straight wings, cv . both traits are encoded by autosomal genes that are linked. a cockroach has genotype bu bu cv cv, and the genes are in repulsion. which set of genes will be found in the most common gametes produced by this cockroach?

I’m stuck on this question cuz i’m stupid sksksksk

Which best describes a gene? a. a sister chromatid b. a chromosome c. a tetrad d. a piece of a chromosome