6. In peas, long stem "A" is dominant over short stem, "a". Give the expected genotypes, phenotypes and the probabilities for the following crosses: a) homozygous long x short b) heterozygous long x short c) heterozygous long x homozygous long d) heterozygous long x heterozygous long 7. In man, normal pigmentation is due to a dominant allele "A" and albinism to its recessive allele "a". A normal man marries an albino woman and their first child is an albino. What are the genotypes of these three people? An albino man marries a normally pigmented woman who had an albino mother. What are the possible genotypes and phenotypes of the children of this couple and the probability of each? 8.

4. A different population of lemmings have a third allele (i.e. a third version of the same gene) for hair colour, the blue allele. a) When pure-breeding red-haired lemmings were crossed with pure-breeding blue haired lemmings, the offspring all had purple hair. Using appropriate genetic diagrams, explain the above result. b) Predict the offspring and their ratios if the purple-haired lemmings were crossed with one another.

17.Dierentiate between the following: a)dominant and recessive b)gene and allele c)homozygous and heterozygous

A) what are the genotypes for EB27 and EB67? B) what is the relationship between the three alleles (B,br, y)? Show evidence using the pedigree

4. Two genes control color in lentils. A- B- lentils are black, A- bb are cream, aa B- are brown, and aa bb are white. A black lentil plant was crossed to a white lentil and all F1 progeny were black. F1 lentils were crossed to each other and you observe 105 black, 27 cream, 24 brown, and 14 white. 4A. What are the genotypes of the F1 lentils? A. A mix of A-B- genotypes. В. АаBb C. Can't say Answer: 4B. Rounding down any expected progeny to the nearest whole number, what is the Chi squared statistic (rounded to tenths place) for whether your observed progeny fit your expectation for unlinked genes? Answer: 4C. What is the statistical significance of this value? (use the contingency table in the book). Answer:

4. Barb Wyre, a plant geneticist at the UK Ag Experiment Station, has set up a cross between two tobacco plants - one is heterozygous for three genes, and the other is homozygous recessive for the same three genes. She sows the F1 progeny seeds in the field; unfortunately, a hailstorm destroys some of her plants. Fortunately, she has enough survivors to permit an accurate statistical analysis of the cross, and she proceeds. The adult F1 plants exhibit the following phenotypes: OPS- OPS OpS - OPS - I 2 1 96 Ops OPS 110 op S - 306 ops 63 - - - 73 348 - Construct a map of the three genes.

2. 9, 1 pts Cystic fibrosis is a disease which is caused by a defective CFTR gene. This form of the gene is recessive. Let "N"=normal CFTR gene and "n" = abnormal CFTR gene. What is the genotype of individual 1 in generation I? 1. %3D 2 3 II 2 3. 5. O NN O Nn O Either NN or Nn

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?

10. What phenotypes are expected and in what proportion from each of the following n crosses? (Assume D, G and Ware dominant over d, g and w, respectively.) 31 (a) DdGGww x DDGgWw how bon (b) ddggWw x DdGgww HD: (c) DdGgWw x DdggWw (d) DdGgWW x DdGgWW baildhalos 6 am bunjid-roloos (d) nomow sof bemam nam lemona (0) namnow beild-oloss of bemem nem tarono [b) int euogyson M 11. Radishes can be long, round or oval in shape. They may be red, white or purple in color. A long red variety was crossed with a round white variety. In the F₁ generation, all were oval purple. In the F2 generation, there were 8 long red, 15 long purple, 17 oval red, 31 oval purple, 7 long white, 15 oval white, 8 round red, 16 round purple and 9 round white. Explain the genetic basis of these results. hot tmsidorss endohes barlastis bed terftet ben hemouth bra (Jisi edohss srillo sonsmedni Snem ar to gaylonog ori ai fer msil) ov fa cisiv lemon diw be (!) 12. In shorthorn cattle, the allele for red coat color (R) is…

1. The height of a wheat plant is determined by several genes. In a variety the minimum size is 12 inches and the maximum is 24 inches. 12-inch plants were crossed with 18-inch plants, and produced an 18-inch F1. The F1 was allowed to cross each other, and an F2 was obtained in which the 12 and 24 inch plants were obtained with a frequency of 2/8195. How many genes are involved in determining plant size in this variety of wheat? Select one: a. 5b. 6c. 4d. 3