Which of the Following Can Be Used to Estimate the Number

Question

Which of the following can be used to estimate the number of crossovers that occur during meiosis?
A) Count chiasmata
B) Count recombinant chromosomes
C) Count centromeres
D) Count chiasmata and Count recombinant chromosomes
E) Count recombinant chromosomes and Count centromeres

Accepted Answer

Counting chiasmata and recombinant chromosomes can both be used to estimate the number of crossovers that occur during meiosis. Chiasmata are physical manifestations of crossovers, and the number of chiasmata observed can give an estimate of the number of crossovers that occurred. Recombinant chromosomes, which result from crossovers, can also be counted and used to estimate the number of crossovers. Counting centromeres does not provide information about crossovers.