Question

1.) Which of the following is not a mechanism to cause exon shuffling?

a.) Pseudo-homologous centromere walking

b.) Illegitimate recombination

c.) Crossover events

d.) Transposon emigration

e.) All of these are exon-shuffling mechanisms

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2.) Early estimates of the number of protein-coding genes was over 100,000 genes. Why was this number so high?

a.) The area of the genome that was analyzed had a high density of genes (gene-rich) and so it inflated the estimated number of genes

b.) The RNA data the scientists were working on was contaminated with a gene-rich species.

c.) The number is correct, we do have over 100,000 genes

d.) None of these answers is correct

Answer 1

1) Pseudo-homologous centromere walking is not a mechanism to cause exon shuffling.

Illegitimate recombination, crossover events, transposon emigration are the mechanisms to cause exon shuffling.

2.) Early estimates of the number of protein-coding genes were over 100,000 genes. This number was so high because the area of the genome that was analyzed had a high density of genes (gene-rich) and so it inflated the estimated number of genes.

The correct answer is: a.) The area of the genome that was analyzed had a high density of genes (gene-rich) and so it inflated the estimated number of genes.