4. In pea plants, purple flowers are dominant over white flowers. If a homozygous dominant plant was crossed with a homozygous recessive plant for flower color, what percentage of their offspring would have white flowers? Show your work. P P P Pp Pp р 0% P Pp Pp 5. If two offspring from the previous question were crossed, what percentage of the offspring would have purple flowers? Show your work. Ⓒ Keystone Science- All Rights Reserved

5. solve and discuss genetics problems illustrating the different types of gene interactions, interpret results and infer relationships related to dominance, sex linkage, recombination etc

2. In corn the genes for tassel length (alleles T and t) and rust resistance (alleles R and r) are known to be on separate chromosomes. In the course of a routine mating check experiment, a breeder got the following results upon crossing T/t:R/r with a double recessive strain (t/t/r): Number of progeny genotype T/t; R/r t/t; r/r T/t; r/r t/t; R/r In addition to these data she noted that the cobs contain only about 50% of the expected kernels. Note that in corn, each kernel is the result of one mating or can be considered one progeny. Hence 50% of the matings are not producing viable offspring. a. Based on the location of these genes on separate chromosomes what is the 98 104 3 5 expected result? b. Suggest a hypothesis of a genetic process that could be used to explain the potential karyotype of one of these parents. c. What are the actual genotypes of the parents? d. Draw a diagram (hand drawn diagrams are fine just scan the image and insert it into your exam as picture) showing the…

H T 7. Here is a cow genetic map: H= French horns h h = English horns C = chews cud c = swallows cud whole T= has tender meat; tastes good t = likes expensive watches; has good taste 40 cM Capital letters and small letters represent dominant and recessive, respectively, as usual. If this cow is test crossed, what % of the calves will be dominant for all 3 genes (has French horns, chews cud, and tastes good)? SHOW WORK.

1. Tall pea plants are dominant to short pea plants. A tall pea plant (TT) is crossed with a short pea plant (tt).

2. In the following types of matings, the phenotypes of the parents are listed together with the frequencies of phenotypes occurring among their offspring. Indicate the genotype of each parent (you may need to use testcrossesl). Parents Offspring I B:0 을 A: 을B 을 AB : B: A: 0 를 AB : 를 A a. Вx В Ь. Ох АВ Ox AB Bx A d. Bx A C. TV Sex Lin ko

4. please answer this

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Part 2. Do one more example of a monohybrid cross. This time assign the letter "B" for onion taste. Being sweet is dominant controlled by allele (B) and being bitter is recessive-controlled by allele (b). Cross individuals who are both heterozygous for this trait. 5. What is the genotype of each of these heterozygous individuals? 6. What is the phenotype of these heterozygous individuals? Complete the Punnett square below using the alleles you just listed. 7. What are the resulting genotypes and their ratios or %? 8. What are the resulting phenotypes and their ratios or %? Figure 3. Monohybrid Cross for Onion Taste. 103

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: