F1 x F1 self-fertilization gives a 9:7 phenotypic ratio in the F2. What phenotypic ratio would you expect if you test-crossed the F1?     b) An F1 x F1 self-fertilization gives a 9:3:4 phenotypic ratio in the F2. What phenotypic ratio would you expect if you test-crossed the F1?     c) An F1 x F1 self-fertilization gives a 15:1 phenotypic ratio in the F2. What phenotypic ratio would you expect if you test-crossed the F1?

23. What is the probability that the progeny of a cross between two individuals that are AABBCCDD will have the same genotype as the parents? A) 1/256 B) 1/16 C) 1/4 D) 1 24. Which of the following inheritance patterns describes the ability of a single allele to have multiple phenotypic effects? A) incomplete dominance B) multiple alleles C) pleiotropy D) epistasis 25. Phenylketonuria (PKU) is an inherited disease caused by a recessive autosomal allele. If two individuals are both carriers, what is the probability that their first child will be a carrier for PKU? A) 1/4 В) 1/2 С) 3/16 D) 3/8

A white-flowered plant is crossed with a red-flowered plant and all of the offspring are pink. This is an example of: A) sex-linked inheritance B) the principle of segregation C) incomplete dominance D) linked genes E) codominance

In humans, one type of red-green colorblindness (n) is sex-linked and recessive. A) A woman who is a carrier marries a man with normal vision. What is the chance of having color-blind daughters? Color-blind sons? B) A heterozygous woman and a color-blind man marry. What is the chance of having color-blind daughters? Color-blind sons?

3)The inability to synthesise chlorophyll is a recessive characteristic in tobacco plants. If a tobacco plant know to be heterozygous is self pollinated, and 600 of its seed were germinated, a) how many would you expect to produce albino (completely unpigmented) plants? b) how many would be expected to have the parental genotype? c) why is this cross the only way to produce albino tobacco plants

A particular flower can be purple, blue, red or white. Two different pure-breeding white plants are crossed and the F1 are then crossed to produce an F2 generation. What might a 9:7 phenotypic ratio in the F2 indicate? A) additivity B) codominance C) recessive lethality D) reciprocal recessive epistasis E) dominant epistasis Explain each answer.

Stacey and Rishi are expecting fraternal twins, a boy and a girl. Stacey and Rishi have normal vision, but both of their fathers are colour vision deficient (CVD, a X-linked recessive trait). a) Draw a pedigree for their family b) Complete a Punnett square to show the cross between Stacey and Rishi. c) What is the probability that the baby will be a girl with CVD? d) What is the probability that the baby will be a boy with normal vision?

A) For the 3-point test cross, draw a sample gene map. B) Give the map distances (include units). C) Calculate Interference (I) and COC. Show all work Fly trait body texture, antenna shape, eye color gaunt, normal, white gaunt, feathery, white gaunt, feathery, red shrunken, feathery, white shrunken, normal, white shrunken, feathery, red gaunt, normal, red shrunken, normal, red Total number of progeny: Gamete from trihybrid GNr Gnr GnR gnr gNr gnR GNR gNR Number 628 2708 113 3 124 661 2 2761 7000

A white flower is crossed with a purple flower, and the offspring exhibit incomplete dominance. A) What is the phenotypic ratio of the F1 generation offspring? What is the genotypic ratio of the F1 generation offspring? B) What is the phenotypic ratio of the F2 generation offspring? What is the genotypic ratio of the F2 generation offspring? Answer and work:

Cross a true-breeding plant that produces yellow seeds with a plant that produces green seeds. a) Using the table below, specify the notation that you will use. b) What are the genotypes of the parent plants? c) Draw the Punnett Square for the cross. d) Write the expected genotypic ratio of the potential offspring. e) Write the expected phenotypic ratio of the potential offspring. Character Flower color Flower position Seed color Seed shape Pod shape Pod color Stem length ©2012 Pearson Education, Inc. Dominant Purple Axial Yellow Round Inflated Green Tall Traits Recessive White Terminal Green Wrinkled Constricted Yellow Dwarf