Name: ____________________________ Date: ________________
Color Challenge Activity: Thinking about dragon color off-line
GenScope Materials: The Dragon Genome reference sheet
1. Is it possible for a gold dragon to have an azure baby?
By looking at the Dragon Genome sheet, the student will see that a gold dragon is a-/B- and azure is aa/Bb, so yes, she could have an azure baby.
If so, list all the possible colors that the father could be:
Bronze or azure
A bronze male could be Aa/Bb and an
azure male would be aa/Bb. Both of these males would provide the necessary
a and b alleles needed to match up with the female's a-/B- to produce the
Explain your answer.
The explanation should be just like the
one given in italics directly above.
Yes. The topaz male, even though he is
a non-fire breather, could be heterozygous for firebreathing (Ff), thus
making it possible for them to have a fire- breathing daughter.
b. What genes are needed to produce a baby dragon like this?
These two dragons mate and produce a
bunch of baby dragons (offspring). List all of the possible colors
for the babies below. Include an explanation using the color genes involved.
Emerald females and topaz and azure males. Emerald is A-/B-. If a-/b- females are produced they die, due to the lethal b allele. The males will be topaz Aa/BB and azure aa/Bb. The a-/B- allele pair comes from the mother and the father contributes A_/B_ or a_/b_.5. A gold dragon (which doesn't breathe fire) mates with a bronze dragon (which also doesn't breathe fire). Can they have an amethyst baby which breathes fire?
If crossover were to occur, in addition to the combinations given above, small numbers of gold (a-/B-) females, bronze (Aa/bB) and amethyst (aa/BB) individuals would be produced. The kids will probably not be aware of this possibility. This is for your edification.
Since two recessive f's are needed for
a male to breathe fire and the mother doesn't have one (she has the dominant
F), none of the sons will be able to breathe fire. However, fire breathing
is sex linked. Some daughters could be firebreathing if the father is heterozygous
for fire breathing (Ff). He could then contribute the recessive f to his
Aa/Bb are the alleles needed to produce a bronze dragon. Mom contributes an A-/B- and Dad has aa/Bb. Therefore, he can contribute the necessary a and b.
Why are there different sets of colors for male and female dragons?