A human double cross-over.
GRAHAM
J B
JB
TARLETON
H L
HL
RACE
R R
RR
SANGER
R
R
D002875:Chromosomes; D003117:Color Vision Defects / Q000235:genetics*; D006467:Hemophilia A / Q000235:genetics*; D006801:Humans; D008511:Medicine
CHROMOSOMES; COLOR BLINDNESS/genetics; HEMOPHILIA/genetics