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Dragon Genetics

Total questions: 14

Worksheet time: 9mins

Name
Class
Date
1.

In dragons, the allele for fire breathing (F) is dominant. Show the genotypes of all possible dragons.

a)

FF, Ff

b)

Ff, ff

c)

FF, ff

d)

FF, Ff, ff

2.

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?

a)

25%

b)

50%

c)

100%

d)

75%

3.

If two heterozygous (Ff) dragons are crossed, what proportion of their offspring would you expect to NOT be fire-breathers?

a)

25%

b)

100%

c)

50%

d)

75%

4.

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?

a)

100%

b)

75%

c)

50%

d)

0%

5.

Two winged (W) dragons produce an offspring that does not have wings (w). What are the genotypes of the parents?

a)

ww

b)

WW

c)

Ww

6.

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?

a)

75%, WW

b)

50%, Ww

c)

100%, Ww

d)

25%, ww

7.

A dragon with wings (Ww) is crossed with one that does not have wings (ww). What percentage of their offspring will be wingless?

a)

75%

b)

50%

c)

25%

d)

100%

8.

Dragons also come in a mini (dwarf) variety. Dragon dwarfism is caused by a dominant allele (L). Show all of the possible genotypes.

a)

LL, ll

b)

Ll, LL

c)

ll

d)

LL, Ll, ll

9.

A mini-sized (LL) dragon is crossed with one that is normal sized (ll). What percentage of the offspring will be mini-sized?

a)

100%

b)

25%

c)

50%

d)

75%

10.

Blue wings (b) are recessive to purple wings (B). How many offspring would have blue wings if two heterozygous (Bb) dragons are crossed?

a)

50%

b)

25%

c)

100%

d)

75%

11.

A homozygous purple winged (BB) dragon is bred with a homozygous blue winged (bb) dragon. What percentage of offspring will have purple wings?

a)

100%

b)

75%

c)

0%

12.

What are the chances of producing a blue winged dragon when a purple (Bb) dragon is crossed with a blue (bb) dragon?

a)

75%

b)

100%

c)

25%

d)

50%

13.

A dominant trait requires how many copies in order to be seen?

a)

2

b)

3

c)

1

14.

An organism that is heterozygous will have

a)

two different alleles (Bb)

b)

two dominant alleles (BB)

c)

two recessive alleles (bb)

d)

none of the above