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- ull T-Mobile LTE 10:32 PM © 73% Mendelian Genetics Lab LASC... MENDELIAN GENETICS Define the following terms: Gene: Homozygous: Allele: Heterozygous: Phenotype: Dominant: Genotype: Recessive: P, F1, F2 generations: Introduction to probability To understand genetics, it is essential to understand probability. The numerical value of the probability of an event can range from 0 (impossible) to 1 (certainty). For example, what is the probability of flipping a coin and getting tails? There are two possible outcomes (heads and tails) that are equally likely, but we are looking for the probability of just one of them (tails). Probability of tails = ½ = 0.5. What is the probability of tossing a six-sided die and getting a four? What is the probability of tossing a six-sided die and getting an even number? What is the probability of tossing a six-sided die and NOT getting a four? The first law of probability states that the results of one trial do NOT influence the results of later trials for…12:27 O Q3. ACTIVITY 2. NONMENDELIAN INHERITANCE Non-Mendelian Genetics - Practice 1. In plants known as "four o'clocks", the allele for the dominant red-flower color is incompletely dominant over the allele for white-flowers. A gardener allows several heterozygous pink- lowered four o'clocks to self pollinate and collects 200 seeds. Draw a Punnett square for the cross. Identify the flower color phenotypes and theoretical percentage. Phenotyps Percentages 2. Skin color in humans is determined by a polygenic inberitance system, possibly involving as many as 9 genes. For simplicity let's consider the influence of 2 genes: A and B, where the dominant allele darkens skin color. Suppose a woman who is AABb mates with a man who is Aabb. A. List all of the passible genotypes of the gametes that could be produced by cach the parents. Identify the percent ratios. Genorype: Ratio Genotype: Ratio Genotype Genotype Ratio: 3. In rabbits, white coat color (C") and black cogt color (C) are…ng -Courses iblic/activ 003004/a s sment al V T-Rex Game. un in to your acc. L 1.3.4 Quiz: Predicting Genetic Outcomes Question 1 of 10 Mendel used over 28,000 pea plants in his experiment. How does this large sample size make his results more reliable? O A. He was not sure which of the plants were female and which were male. B. Most of the plants were unable to reproduce, so he needed many of them. C. He used more plants so the experiment wouldn't take as long. D. It made his actual results approach the results predicted by probability. SUBMIT E PREVIOUS
- Assignment: Complete all the problems listed for Group A and B, and at least two questions from Group C. You can submt a Word Document, PDF, or write/draw things out by hand and scan or make a document from plctures of your work. Questlon GROUP A: Genetics Problems 1. In humans, six fingers (F) Is the dominant trait; five fingers (f) Is recessive. Fill-In the blanks below for the example of a cross between two heterozygous individuals. a) Parental phenoypes b) Father's genotype c) Genotype of gametes from the father d) Complete a Punnett Square for this cross e) What is the probability that this couple will have a child with five fingers? Mother's genotype or from the mother or 2. Cystic fibrosis (CF) is an inherited chronic disease that affects the lungs and digestive system of about 30,000 children and adults in the United States. It is caused by a recessive allele that encodes a defective chloride channel. Genetic screening has determined that two parents are carriers…NAME: Patterns of Inheritance Worksheet 1. True Breeding Parental Cross A homozygous dominant purple flowered plant is crossed with a homozygous recessive white flowered plant. a. What are the genotypes of the parent plants? (Use the Punnett square to determine the outcomes of this cross. Remember to place the gametes along the left side and top of the square. (P=Purple, p=white) b. What is the genotype of all F₁ plants? 1 b. c. What is the phenotype of all F₁ plants? C. d. How many plants out of 4 will produce white flowers? d. a. 2. Monohybrid Cross: The F₁ offspring from the above problem are allowed to self fertilize. a. What are the genotypes of the F₁ parents? a. (Use the Punnett square to determine the outcomes of this cross. Remember to place the gametes along the left side and top of the square.) b. What is the genotype ratio for this cross? c. What is the phenotype ratio for this cross? d. How many plants out of 4 will produces white flowers? d. b. C.Solve for the genetic structure of a population with 12 homozygous recessive individuals (yy), 8 homozygous dominant individuals (YY), and 4 heterozygous individuals (Yy).
- Activity 4 Identification of phenotype of known genotype The characteristic of the color of the red tomato fruit (R) is dominant over the characteristic of the yellow color (r) The characteristic of the color of white flowers (W) is dominant over the characteristic of the color of the yellow flowers (w), and the characteristic length of the stem of the plant (T) is dominant over the short characteristic (t) If a red fruit plant with yellow and long-stemmed flowers is crossed, with anotheryellow, white-flowered and short-stemmed plant, knowing that the dominant characteristic is pure. What is the phenotype of individuals of the resulting generation?Q1. In Mendel's dihybrid cross of peas, the gene coding stem size has the dominant allele Long (L) and recessive short allele (1). The gene for flower color has the dominant purple (P) over the recessive white (p). The 2 genes for size and flower color are located on different chromosomes. Parent P1 which genotype is LL PP is crossed with parent P2 which genotype is 11 pp. a) What are the phenotypes of P1 and P2? b) What is the genotype and phenotype of the F1 generation? c) What is the genotype of a tester that can be used with an F1 individual? d) what are the expected genotypes and phenotypes of the progeny of the cross F1 x tester? e) what is the frequency of each phenotype in the progeny of the cross F1 x tester?M. N. R. Can you curl your tongue? Tongue-curling in humans (T) is a dominant genetic trait. Derek can curl his tongue but his wife, Ashley, cannot. All nine of their children can curl their tongues. Complete the Punnett square based on the genotypes they most likely have. 12. Phenotype Probability (%) Derek Tongue-curling: Cannot Curl Tongue: Genetics Punnett Squares Ashley P.
- PRACTICE EXERCISES 2: 1. For instance, in cows, red (R) and white (W) are two possible hair colors. However, when a red cow and a white cow mate, instead of one color being dominant over the other, BOTH are expressed, in a color called roan (red-and-white). Fill out the genotypes below: Homozygous red: Homozygous white: Roan: Show the Punnett Square for a cross between two roan cows: Probability of roan offspring: Probability of red offspring: Probability of white offspring: % 2 If R is the allele for red and W is the allele for white in a flower, and this is codominance, show what happens if a red flower is crossed with a white flower. Red genotype: White genotype: Phenotype (offspring): Genotype (offspring):14:27 46 lll 33% GENETICS...IGNMENT ASSIGNMENT 1 1. Using the central dogma of molecular biology, explain the terms replication, transcription and translation. 2. A heterozygous fair male had a conjugal interaction with a homozygous dark female. Using an appropriate genetic diagram, explain the genotypic and the phenotypic appearance of the second felial generation of these parents. Note: Darkness is dominant over fairness. IIIWhat are major advantages of principles of inheritace and variation? 1-4-2020