In 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?

(a) bu+ cv+
(b) bu cv
(c) bu+ bu
(d) cv+ cv
(e) bu cv+

(E) bu cv+

Explanation:

Linkage is the phenomena in which two genes present on same chromosome have a tendency to get inherited together.

It is given that the two autosomal genes are linked and in repulsion. This means that the dominant allele of one gene is linked to the recessive allele of another gene and vice versa.

Hence, the parental type gametes will have bu cv+ and bu+ cv combination. Since in linkage parental gametes always appear in higher numbers than recombinant gametes, out of the given options bu cv+ set of genes will be present in most gametes produced by this cockroach.

from my research i have to the conclusion that decomposers, such as fungi, bacteria and invertebrates, play a critical role in nutrient cycling and without them the earth's ecosystem may not support life as we know it. elements such as carbon, nitrogen and phosphorus exist in limited amounts on earth, although huge amounts of carbon are being released into the atmosphere from underground sources now by humans. it is still extremely important that other nutrients be retained by the process of re-use. decomposers are organisms that are able to chemically break down dead material and make these elements available for use by other organisms. without this breakdown of dead material, dead bodies would pile up. so decomposers also play a role in clean up also. without them, life might not continue as we know it and dead material would overwhelm the earth.