2. Cross a Blue Parakeet (BByy) With a Green Parakeet (BBYY). What is the genotype and phenotype of the offspring? types: Phenotypes:

8. Ability to taste PTC (phenyl thiocarbamide), a bitter chemical found in some vegetables, depends on carrying at least one dominant allele, T, for the taster trait. Non-tasters are homozygous for the recessive allele (t). Another trait, albinism, is inherited as a simple recessive in which normal pigmentation is dominant. An albino man who is a taster and has a mother who is a nontaster marries a normally-pigmented woman who is a nontaster and whose father is an albino taster. (a) What are the genotypes of the man and his wife? (b) What types of children might this couple expect? MI 900 9. In pigeons, the checkered pattern depends on a dominant allele C and plain on the recessive allele b. recessive allele c. Red color is controlled by a dominant allele B and brown by the (a) Diagram a cross between homozygous checkered red and plain brown birds. Summarize the expected F₁ and F₂ results. (b) A checkered brown female mated with a plain red male to produce 2 checkered red, parents. 2…

1. Two people with wavy hair have a straight-haired child. Wavy hair is a dominant. What are the genotypes of the parents? What is the possibility that their next child will have wavy hair? Show the genotype and phenotype ratios that result from the above cross. Show the Punnett square.

1. If a person's genotype for gene a and gene b is AaBb, what are the possible allelic compositions in a gamete (What alleles for gene a and gene b can be found in a gamete)? 2. Gene p specifies flower color. The dominant P allele specifies purple color, the recessive p allele specifies white color. What is the phenotypic ratio of purple flower : white flower in a monohybrid cross? 3. Gene y specifies seed color. The dominant Y allele specifies yellow color, the recessive y allele specifies green color. Gene s specifies seed skin. The dominant S allele specifies smooth skin, the recessive s allele specifies wrinkled skin. What is the phenotypic ratio of yellow color smooth skin : yellow color wrinkled skin : green color smooth skin : green color wrinkled skin for the offspring of a dihybrid cross? 4. Please consider the cross AABBCC x Aabbcc. What is the probability of producing an offspring with AABbCc genotype? What is the probability of producing an offspring with Aabbcc genotype?

1. Use the diagram of the pedigree above, which shows inheritance of an x-linked recessive trait through a family.  Select ALL of the individuals in the pedigree who must be carriers for the trait. E G B C H A

3. A person with hemophilia (sex-linked recessive trait) lacks a protein needed for blood clotting and may bleed to death after a slight cut. What is the expected phenotypic ratio among the children of a woman who is a carrier and a man who is normal ?

8. Construct a Punnett square for a cross between a heterozygous black guinea pig and a homozygous white guinea pig. a. What genotypes would you expect in the offspring? b. What percentage or ratio of each genotype would you expect in the offspring? C. What phenotypes would you expect in the offspring?

5. Rather than studying you are watching Maury. A couple comes on with a baby. The father has brown eyes, his parents, grandparents, sister, and brothers all have brown eyes. The mother has blue eyes and the baby has blue eyes. The brown eye allele is dominant to blue eye allele. Using this information, answer the following questions. Co What is the likely genotype of the father? What is the genotype of the mother? What is the genotype of the child? Refi

1. What is the sex of a pigeon and the crest of a pigeon a product of? 2. What is the THREE letter code for the twisted-ladder chemical that holds genes? How did our PARENT'S genes (genetic information) for eye color, hair color, and other things get to us? 3. 4. How many copies of EACH gene does an individual (pigeon or person) usually INHERIT? What TYPE of GENES or ALLELES do pigeons have for their crests, what can the CRESTS (hair on their head) look like? 5. 6. What are ALLELES? What are the ALLELES for PIGEON CRESTS? 7. What are the LETTERS called we use for a particular GENE?

2. Brown eyes are dominant over blue eyes in humans. Having a peaked hairline is dominant over having a smooth hairline in humans. Two such humans decide to have offspring – who will also be human, because you know – genes. One of the parents has blue eyes and is heterozygous for a peaked hairline. The other parent is brown-eyed with a peaked hairline but is heterozygous for both traits. a) Complete a Punnett square showing all possible genotypes of their offspring. b) What is the probability of this couple producing a child with blue eyes? c) What is the probability of producing a child who has both brown eyes and a smooth hairline?