Name the scientist sometimes described as the "pioneer" of genetics. Define the following terms: a) genotype b) phenotype c) allele d) dominant e) recessive
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- 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):Mnance) Objective: 1. The student will be able to create and complete a Punnett square representing codominance as it relates to their family blood types. 2. The student will be able to analyze data and determine what the possible blood types are for a given set of parents. 3. The student will be able to explain how knowledge of blood types is related to their personal health. Background: Codominance occurs when both alleles in the heterozygote express themselves fully. Because both of the alleles are fully expressed, both alleles are equally emphasized in the genotypic notation. For example, a codominant trait in humans is blood type. The letters A and B that identify blood types refer to the two different carbohydrates that coat the surface of red blood cells. If you have type A blood, you have type A carbohydrate on your red blood cells. Type B blood had type B carbohydrate, Type AB has both carbohydrates, and Type O has no carbohydrates. These alleles are represented by an I, and a…Practice Problem 2: Having a hairline with a widow's peak is dominant and a straight hairline is recessive (W = widow's peak; w = straight hairline). Hint: To avoid confusing alleles, use a bar over the lowercase letter OR chose a letter that doesn't look the same upper and lowercase (instead of "W" and"w" you could use "D" and "d"). Cross: A man with a straight hairline marries a woman homozygous dominant for having a widow's peak. What is the genotypic ratio and the phenotypic ratio for this cross?
- Question: The disorder: Red-Green color blindness Explain the mode of inheritance of the disorder (recessive, dominant, x-linked, etc.) . Can a person be a carrier of this disorder? • Describe the probability of having a child with the disorder -- give a specific scenario (ex. both parents are heterozygous for the trait) • Describe the symptoms associated with this disorder Explain the prognosis of a person born with this disorderApplication Instructions: Before Mendel and his results were fully accepted, there were many theories that were proposed that tried to explain how traits were passed on from one generation to another. In the space provided, list down the important points of each theory. Hippocrates': Brick and Mortar Theory Aristotle: Hereditary Elements in Blood Darwin: Theory of PangenesisPerformance Task: Regular Biology Name: Who Gets the Money? Worksheet Part Three: Sex-linked Inheritance The làwyer now orders that a vision test be We're down to just performed to test for red-green color blindness. Mr. Jones Mrs. Jones Carl Color blind Homozygous for normal vision Color blind Normal vision Dale In the space below, draw a Punnett Squares showing the possible offspring of Mr. and Mrs. Jones for color blindness. Write the genotypes of the persons in the table below: Person Mr. Jones Vision Mrs. Jones Carl Dale SO: WHO GETS THE MONEY? (Don't forget to justify your answer!)
- Karyotype Lab State Standards: The role of cellular division (mitosis) and differentiation in producing and maintaining complex organisms (LS1-4) Ask questions to clarify relationships about the role of DNA and chromosomes in coding the instructions for characteristic traits passed from parents to offspring. (LS3-1) Objective: 1. Identify the types of chromosomes in a human karyotype. 2. Interpret data in a human karyotype and diagnose an individual, based on the data and research of chromosomal disorders. Introduction: This exercise is a simulation of human karyotyping using images of chromosomes created by your teacher from actual human genetic studies. Cell biologists analyze chromosomes by looking at karyotypes. A karyotype is a picture of chromosomes arranged in homologous pairs. A karyotype shows all 44 autosomes, (#'s 1-22 in the karyotype) and the 2 sex chromosomes, (XX or XY). All 46 human chromosomes. You will be examining two different karyotypes, and interpreting your…Switch Background P Immersive Reader 100% Page Width d. What percent of the offspring will be carriers of the white eye trait? 2. Using the same information as for question #1, cross a heterozygous red-eyed female with a red-eyed male. a. What are the genotypes of each parent? ic b. What fraction of the children will have red eyes? c. What fraction of the children will have white eyes? Pra d. What fraction of the female children will carry the white eyed trait?Pedigree Analysis Examine the following pedigrees. 1 Examine the pedigree of achondroplasia (a form of dwarfism). a Is this trait dominant or recessive? b How do you know? c Label all of the genotypes on the pedigree chart. II Laboratory Exercise 9 Trait Genetics 113 %3D
- Procedure: 1. Stick a piece of masking tape on the four 25 g coins. Make sure that the size of the tape is within the circumference of the coin. For this purpose, two of Mendel's seven characters of the pea plant will be used: height and seed color. 2. Mark one side of two coins I (tall allele) and the other side t (short allele). Similarly, mark one side of the other two coins Y (yellow allele) and the other side y (green allele). 3. Monohybrid Cross. In this part, the height character will be investigated. a. Get the two coins for height: one coin corresponds to the male and the other coin to the female. T and t are gametes for tallness and shortness, respectively. b. Place the two coins in cupped hands, shake them, and toss the coins on your desk. c. Read and record the coin combinations in your data sheet. Repeat the toss 50 times. 4. Dihybrid Cross. This time, two traits will be considered: height and seed color. a. Get all four coins, place them in cupped hands, and shake and…Procedure: 1. Stick a piece of masking tape on the four 25 g coins. Make sure that the size of the tape is within the circumference of the coin. For this purpose, two of Mendel's seven characters of the pea plant wll be used: height and seed color. 2. Mark one side of two coins T (tall allele) and the other side t (short allele). Similarly, mark one side of the other two coins Y (yellow allele) and the other side y (green allele). 3. Monohybrid Cross. In this part, the height character will be investigated. a. Get the two coins for height: one coin corresponds to the male and the other coin to the female. T and t are gametes for tallness and shortness, respectively. b. Place the two coins in cupped hands, shake them, and toss the coins on your desk. c. Read and record the coin combinations in your data sheet. Repeat the toss 50 times. 4. Dihybrid Cross. This time, two traits willbe considered: height and seed color. a. Get all four coins, place them in cupped hands, and shake and toss…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?