lecture 17 Flashcards
genetic linkage and recombination pt. 2
during which stage of the cell cycle does genetic recombination/crossing over occur?
meiosis, prophase I specifically
how does the frequency of recombinants compare to the frequency of independent assortment?
recombinants occur at a lower frequency
why do recombinants occur less often?
it takes cellular energy
what is the highest RF? why?
50% because independent assortment is 50%, showing no linkage
what are the products of incomplete linkage?
both parentals and recombinants, just not in the 1:1:1:1 ratio that would be expected
if incomplete linkage occurs between genes that are in cis-configuration, what are the likely products?
mostly parentals with a few recombinants
if incomplete linkage occurs between genes that are in trans-configuration, what are the likely products?
mostly recombinants with a few parentals
if the RF is 16%, how far apart are the linked genes?
16 centimorgans, 16 cM, 16 mapping units, or 16 m.u.
