02.05.2013 Views

Evolution__3rd_Edition

Evolution__3rd_Edition

Evolution__3rd_Edition

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

42 PART 1 / Introduction<br />

Study and review questions<br />

1 Review your understanding of the following genetic<br />

terms: DNA, chromosome, gene, protein, genetic code,<br />

transcription, translation, mRNA, tRNA, rRNA, mutation,<br />

synonymous, non-synonymous, frameshift, inversion,<br />

genetic locus, meiosis, genotype, phenotype,<br />

homozygote, heterozygote, dominant, recessive,<br />

linked, unlinked, and recombination.<br />

2 What are the Mendelian ratios for the following<br />

crosses: (i) AA × AA, (ii) AA × Aa, (iii) Aa × Aa,<br />

(iv) AB/AB × AB/AB, when the A and B loci are unlinked,<br />

and (v) AB/AB × AB/AB, when the A and B loci are tightly<br />

linked (r = 0)?<br />

3 What are the ratio, or fractions, of gametes<br />

(according to their gene combinations) produced by<br />

an individual with the two-locus genotype AB/ab if:<br />

(i) the A and B loci are unlinked, and (ii) the A and B loci<br />

are linked and the rate of recombination between the<br />

two loci is r?<br />

..

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!