Show:
Terminology
Meiosis Connection
Punnett Squares
Extensions to Mendel
Potpourri
100
What is a true breeder?
Same phenotype over multiple of generations when self fertilized.
100
Allele segregation occurs during what?
Meiosis
100
You cross two pink Japanese 4 o'clocks. What is the genotypic and phenotypic ratios?
1 (RR) : 2 (RW) : 1 (WW)
100
What type of inheritance occurs when multiple genes are involved in controlling the phenotype of a trait?
Polygenic like skin color/height
100
How would you get your initials on the side of a Himalayan rabbit and Siamese cat?
Put ice packs on them.
200
What is genotype and phenotype?
Genetic make up (aa) and appearance (white).
200
Mendel's Principle of Segregation occurs during what phase of meiosis?
Anaphase
200
A couple that is BO and BO. What is the probability that their kid will be type B blood?
75%
200
What type of inheritance refers to an allele which has more than one effect on the phenotype.
Pleiotropy like Sickle Cell Anemia.
200
What is the type of influence that leads to coat color in Himalayan rabbits and Siamese cats and skin color in humans?
Environmental influence
300
What is AA, aa, and Aa respectively?
Homozygous dominant, homozygous recessive, and heterozygous.
300
Mendel's Principle of Independent Assortment occurs during what phase of meiosis?
Metaphase
300
What is a dihybrid cross?
Cross between two traits.
300
Heterozygote shows some aspect of the phenotypes of both homozygotes.
Codominant like blood type.
300
What is the probability of landing heads 4X?
1/16
400
What is a monohybrid cross?
One trait (e.g. flower color).
400
What is a Punnet Square and what is it simulating?
Segregation of alleles and fertilization.
400

aa__ and __bb yield white corn and everything else is purple. If you crossed aabb (white) x aaBb (white), what phenotype ratio of white to purple corn would you get?

1:1 Purple to white

400
Heterozygote is intermediate in phenotype between the 2 homozygotes.
Incomplete dominance like pink snap dragons.
400
What is the probability of the following combination of children? Boy, boy, boy, boy, girl?
1/32
500
Define allele.
Alternative form of a gene.
500
Are most human traits controlled by one gene? Explain your answer.
No
500

Mendels classic dihybrid cross he crossed AaBb and AaBb A = yellow peas a = green peas B = round peas b = wrinkled peas What phenotypic ratio would you expect to see in this cross?

9:3:3:1

500
Behavior of gene products can change the ratio expected by independent assortment, even if the genes are on different chromosomes that do exhibit independent assortment.
Epistasis like in corn and lab coat color.
500
What is the probability of obtaining a child with the fairest skin color (aabbcc) from parents with the following genotype? aaBbCc x AaBbcc
1/16