Transcript 2017 N3 Week 2

1/9 Warm Up
Match the definition on the left with the term
on the right:
1. Alternative form of a gene C
A. Gamete
2. Body cells such as a skin cell E
B. gene
3. Egg or sperm cell A
C. allele
4. Process that produces 4 cells G D. Aa
5. A segment of DNA B
E. somatic
6. Homozygous alleles F
F. AA
7. Heterozygous alleles D
G. Meiosis

1/10 Warm Up
1.
In cats, short hair is dominant to long hair.
Cross a heterozygous cat with a cat with
long hair. Include a key, genotype,
phenotype, percent, ratio and fraction.
2.
In mice, black fur is dominant to brown fur.
Cross a pure bred black fur mouse with a
pure bred brown fur mouse.
1/11 or 1/12 Warm Up
1. Foil
the following gametes:
(Bb)(FF) X (bb)(ff)
2. Show the punnett square and predict the
offspring of B=brown eyes and
F=freckles.
1/13 Warm Up
1. Explain the difference between incomplete dominance and
codominance.
Incomplete = both alleles are expressed and the phenotype is
a “blend”
Codominance = both alleles are expressed and the phenotype
is a mixture or patches of both of them
2. What cross will produce the most pink-flowered plants?
Show a punnett square to support your answer.
3. In some chickens, the gene for feather color is controlled
by codominance. The allele for black is B and the allele for
white is W. The heterozygous phenotype is known as
erminette.
• What is the genotype for black chickens? ____
• b. What is the genotype for white chickens? ____
• c. What is the genotype for erminette chickens? ____