Harry Potter Genetics. 1. Ron Weasley has red hair. What is his genotype? bb.
Post on 16-Dec-2015
216 Views
Preview:
Transcript
Harry Potter Genetics
Punnett Square Practice
1. Ron Weasley has red hair. What is his genotype?
Brown hair (B) is dominant to red hair (b).
bb
2. Harry Potter has brown hair. What are his possible genotypes?
BB or Bb
Brown hair (B) is dominant to red hair (b).
3. If a wizard is heterozygous for hair color, what is his genotype?
Bb
4. What is his phenotype?
Brown hair
Brown hair (B) is dominant to red hair (b).
5. Harry Potter’s dad James is homozygous for brown hair. What is his genotype?
BB
Brown hair (B) is dominant to red hair (b).
6. Harry, Ron, and Hermione have magical abilities. What is their genotype?
Being a wizard or witch (having magical abilities) is recessive (m). Being a muggle (having no magical ability) is dominant (M).
mm
7. A man is heterozygous for magical ability. What is his genotype?
Mm8. Would he be a muggle or a wizard?
muggle
Being a wizard or witch (having magical abilities) is recessive (m). Being a muggle (having no magical ability) is dominant (M).
Molly and Arthur Weasley both have red hair.
9. What are their genotypes?
Molly:
Arthur:
bbbb
Brown hair (B) is dominant to red hair (b).
Molly and Arthur Weasley both have red hair.
10. Set up and fill in a Punnett square.
bb
bb
Brown hair (B) is dominant to red hair (b).
bb bb
bb bb
b b b
b
Molly and Arthur Weasley both have red hair.
Brown hair (B) is dominant to red hair (b).
bb bb
bb bb
b b b
b
11. What is the probability their children will have red hair?Probability of red hair
(bb):
4 out of 4 or 100%
Harry Potter’s mom Lily had red hair.His dad James was homozygous for brown hair.
12. What are their genotypes?
Lily:
James:
Brown hair (B) is dominant to red hair (b).
bb BB
Harry Potter’s mom Lily had red hair . His dad James was homozygous for brown
hair. 13. What was the probability that Harry would have
brown hair?
Brown hair (B) is dominant to red hair (b).
bb BB
Harry Potter’s mom Lily had red hair . His dad James was homozygous for brown
hair. 13. What was the probability that Harry would have
brown hair?
Brown hair (B) is dominant to red hair (b).
bb BB
B B
Bb Bb
Bb Bb
b
b
Probability of brown hair (BB or Bb):4 out of 4 or 100%
14. Harry Potter (genotype Bb) marries Ginny Weasley, who has red hair (bb). What is the probability their children will have red hair?
Brown hair (B) is dominant to red hair (b).
14. Harry Potter (genotype Bb) marries Ginny Weasley, who has red hair (bb). What is the probability their children will have red hair?
Brown hair (B) is dominant to red hair (b).
Bb bb
Bb bb
b
b
Probability of red hair (bb):2 out of 4 or 50%
B b
Hermione has brown hair. She marries Ron, who has red hair. They have two children, who both have red hair.
15. What must Hermione’s genotype be?
Brown hair (B) is dominant to red hair (b).
Hermione has brown hair. She marries Ron, who has red hair. They have two children, who both have red hair.
15. What must Hermione’s genotype be?
Brown hair (B) is dominant to red hair (b).
Bb Bb
bb bb
B
b
Ron (red hair): bbHermione (brown hair): BB or BbChildren (red hair): bb
b b
For the children to have red hair, Hermione must be heterozygous (Bb).
Hermione has brown hair. She marries Ron, who has red hair. They have two children, who both have red hair.
15. What must Hermione’s genotype be?
Brown hair (B) is dominant to red hair (b).
Bb Bb
Bb Bb
B
B
If Hermione were homozygous for brown hair (BB), all of their children would have the genotype Bb and would have brown hair.
b b
16. Hermione is a witch. Her parents are muggles. What must Hermione’s parents’ genotypes be?
Being a wizard or witch (having magical abilities) is recessive (m). Being a muggle (having no magical ability) is dominant (M).
16. Hermione is a witch. Her parents are muggles. What must Hermione’s parents’ genotypes be?
Being a wizard or witch (having magical abilities) is recessive (m). Being a muggle (having no magical ability) is dominant (M).
MM Mm
Mm mm
M
m
Hermione’s genotype must be mm because she has magical abilities.
The only way she could have the genotype mm is if both of her parents were heterozygous (Mm).
M m
17. If Hermione had a brother, what is the probability he would be a muggle?
Being a wizard or witch (having magical abilities) is recessive (m). Being a muggle (having no magical ability) is dominant (M).
MM Mm
Mm mm
M
m
M m
17. If Hermione had a brother, what is the probability he would be a muggle?
Being a wizard or witch (having magical abilities) is recessive (m). Being a muggle (having no magical ability) is dominant (M).
MM Mm
Mm mm
M
m
M m
Genotypes for muggle:
MM or Mm
17. If Hermione had a brother, what is the probability he would be a muggle?
Being a wizard or witch (having magical abilities) is recessive (m). Being a muggle (having no magical ability) is dominant (M).
MM Mm
Mm mm
M
m
M m
Probability of being a muggle:
MM or Mm3 out of 4 or 75%
top related