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WorksheetsDragon Genetics
Total questions: 14
Worksheet time: 9mins
In dragons, the allele for fire breathing (F) is dominant. Show the genotypes of all possible dragons.
FF, Ff
Ff, ff
FF, ff
FF, Ff, ff
If a heterozygous fire-breathing (Ff) dragon is crossed with one that does not breathe fire (ff), what proportion of their offspring will be fire breathers?
25%
50%
100%
75%
If two heterozygous (Ff) dragons are crossed, what proportion of their offspring would you expect to NOT be fire-breathers?
25%
100%
50%
75%
Also in dragons, wings (W) are a dominant trait. If you crossed two wingless (w) dragons, what proportion of their offspring would you expect to have wings?
100%
75%
50%
0%
Two winged (W) dragons produce an offspring that does not have wings (w). What are the genotypes of the parents?
ww
WW
Ww
If a homozygous winged (WW) dragon is crossed with a purebred wingless (ww) dragon, what proportion of their offspring will be winged and what is their genotype?
75%, WW
50%, Ww
100%, Ww
25%, ww
A dragon with wings (Ww) is crossed with one that does not have wings (ww). What percentage of their offspring will be wingless?
75%
50%
25%
100%
Dragons also come in a mini (dwarf) variety. Dragon dwarfism is caused by a dominant allele (L). Show all of the possible genotypes.
LL, ll
Ll, LL
ll
LL, Ll, ll
A mini-sized (LL) dragon is crossed with one that is normal sized (ll). What percentage of the offspring will be mini-sized?
100%
25%
50%
75%
Blue wings (b) are recessive to purple wings (B). How many offspring would have blue wings if two heterozygous (Bb) dragons are crossed?
50%
25%
100%
75%
A homozygous purple winged (BB) dragon is bred with a homozygous blue winged (bb) dragon. What percentage of offspring will have purple wings?
100%
75%
0%
What are the chances of producing a blue winged dragon when a purple (Bb) dragon is crossed with a blue (bb) dragon?
75%
100%
25%
50%
A dominant trait requires how many copies in order to be seen?
2
3
1
An organism that is heterozygous will have
two different alleles (Bb)
two dominant alleles (BB)
two recessive alleles (bb)
none of the above
