Dragon Genetics

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

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

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%