Genetic Variation and Change
dihybrid crosses
What the heck! We now have to look at TWO traits at a time!
red/brown eyes & bown/black body
gene 1 for eye colour (e) & gene 2 body colour (B)
so what happens when 2 flies heterozygous for BOTH traits mate....
ie BbEe x BbEe
first we need to figure out the possible gamete genotypes......
Which are the dominant alleles?
How we know?
mooving right along....
solid colour is dominant over patchy
&
black is dominant over brown
so
(A) what is going on here?
(B) what would you get if you mated the black and white bull at the top with the brown and white cow?
&
black is dominant over brown
so
(A) what is going on here?
(B) what would you get if you mated the black and white bull at the top with the brown and white cow?
workbook ref: pp 163 - 169