$4.)$ This problem is based on the Color Vision lecture, although the example is from a

different gene.

Four different globin genes occur next to each other in humans in the following order:

Gy

Ay

$$ They probably derive from gene duplication events of a single, ancestral, globin gene. The four genes and their proteins have similar, but not identical,

sequences. In meiotic prophase $1,$ non$-$sister chromatids occasionally misalign. a$.)$ Draw the homologues as they would be if the $$ and o globins of a

homologous pair of chromosomes lined up in error. b$.)$ Suppose that recombination occurred internally in the B$/$o pair. In your first

drawing indicate where the crossover occurs. c$.)$ In a second drawing show the two resulting chromosomal regions. $($Use

shading in the o globin gene as above.$)$