1. Wake-up
Cross a heterozygous man for eyebrows with a woman with a unibrow. A unibrow is a recessive trait.
What are the chances of them having a child with a unibrow?

2. Special Crosses: Incomplete Dominance and Codominance

3. What is Incomplete Dominance?
Blending of the dominant and recessive alleles in heterozygous
3rd phenotype

4. Plant: Snapdragons
White: r
Red: R

5. Pink: Rr

6. Humans: Hair Type
Curly: C
Straight: c

7. Wavy: Cc

8. In snapdragons, red flowers are dominant over white flowers
In snapdragons, red flowers are dominant over white flowers. The heterozygous genotype has pink flowers. Cross a homozygous red-flowered plant with a pink flowered plant. What are the chances of producing white flowers? (R = red and r = white)

9. If a yellow guinea pig is crossed with a white one, the offspring are cream-colored. What kinds of offspring are expected if two cream-colored guinea pig mate? (Y = yellow and y = white)

10. What is Codominance?
Both dominant and recessive alleles are expressed in heterozygous
3rd phenotype

11. Chickens: Feather Color
Black: B
White: b

12. Black and White: Bb

13. Cattle: Fur Color
Red: R
White: r

14. Roan: Rr

15. In certain cattle, hair color can be red (homozygous RR), white (homozygous rr), or roan (a mixture of red and white hairs, heterozygous Rr). When a red bull is mated to a white cow, what genotypes and phenotypes of offspring could be obtained?

16. If one of the offspring found above were mated to a white cow, what genotypes and phenotypes of offspring could be produced? In what proportion?

17. Class Data: Fingerprints
Check if present
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