Short Answer 3. The pedigree shown is of a family with an X-linked recessive disease. The sex chromosomes are indicated. Individual II-2 is the result of a non-disjunction event in one of the parents. 11 1 2 XHXH XHY XhY 2 XhXhY A) If the nondisjunction event that gave rise to Il-2 occurred in the father, in which phase of meiosis did it happen? Expla your reasoning. B) Upon further testing, it is discovered that Individual 1-1 has a mild case of the disease. Please give a short explanation as to how that is possible.

Short Answer 3. The pedigree shown is of a family with an X-linked recessive disease. The sex chromosomes are indicated. Individual II-2 is the result of a non-disjunction event in one of the parents. 11 1 2 XHXH XHY XhY 2 XhXhY A) If the nondisjunction event that gave rise to Il-2 occurred in the father, in which phase of meiosis did it happen? Expla your reasoning. B) Upon further testing, it is discovered that Individual 1-1 has a mild case of the disease. Please give a short explanation as to how that is possible.

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter7: Development And Sex Determination

Section: Chapter Questions

Problem 17QP: Equalizing the Expression of X Chromosome Genes in Males and Females How many Barr bodies would the...

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Short Answer 4. You identify two recessive mutations in fruit flies, one that results in curly wings (cc) and one in an ebony body (ee). You cross two flies that are heterozygous for both traits (CcEe), and find 352 flies progeny in the next generation with the following phenotypes: wild type - 193 wild type wings, ebony body - 69 You believe the curly and ebony alleles assort independently and are not linked. Perform a chi square analysis for this cross to test the null hypothesis. A) Show at least the following parts of your work: the expected vs. observed numbers for each phenotype, and the final X² value. Observed Expected (o-e)²/e wild type body, curly wings - 64 curly wings, ebony body - 26 Edit View Insert Format Tools 12pt ✓ Paragraph Table X² U AV T² v BIUA V V QV G✓ ⠀
3 (Lecture 13 Study Guide, Question #10) Genetic traits on the X-chromosome are called X-linked. Some X-linked conditions are referred to as X-linked dominant, such as Fragile X Syndrome. Consider the following genetic cross: A father with Fragile X Syndrome and a mother with normal phenotype. Perform a Punnett Square. Select the possible genotypes of their offspring below. xFxf xFY
Arial 11 BIUA 田回▼ 三=三|三|: 12 II 4. Below is a diploid cell in meiosis. a. Label one set of homologous chromosomes, one set of sister chromatids and one set of heterologous chromosomes. b. How many alleles of the 'A' alleles are present in the cell at Prophase 1? c. How many copies of the 'A' genes are present in each cell at Prophase II? d. How many 'a' alleles are present in Anaphase 1? e. How many 'F' alleles are present in each cell in Metaphase I? f. How many 'f alleles are present in each cell in Metaphase ll? g. How many 'F' genes are present in each gamete? h. How many chromosomes will be present in each gamete? MacBook Air
I need this to be : to be shown as superscript on the X chromosomes
GENETIC DISORDERS 2 3 1. 2 3 XK XK XK X* XX xX XX KX Xe XX KK X* 3 K* K XX 8 9 10 11 12 13 14 15 8 9 10 11 12 13 14 15 ?8 ת A XX XX XX X 称家a M 16 17 18 19 20 21 22 XX 16 17 18 19 20 21 22 XXY Figure 2 Figure 1 1. Suppose a child was found to have the chromosome pattern shown in Figure 1 above. a. Is the child a male or female? b. Explain your answer. c. Down syndrome is caused by one extra autosome in each cell. What pair of chromosomes has an extra chromosome? d. How did this child get an extra chromosome? 2. Suppose a child was found to have the chromosome pattern shown in Figure 2 above. a. Is the child a male or female? b. Explain your answer. e. Which chromosome is the extra chromosome, an X or Y7 d. How did the child get an extra chromnseme?
Pedigree 2: A. What is the most likely mode of inheritance of this disease? Choose from: autosomal dominant, autosomal recessive, X-linked dominant, X-linked recessive. B State the genotypes of individuals # 1 #4. C If individual #3 has another daughter with the same partner, what is the probability that this daughter will be affected (show the disease)?
Incomplete Dominance 1. In snapdragons, red flower color (R) is incompletely dominant over white flower color (r). The hybrids or heterozygous plants (Rr) are pink in color. a) Show the genotype for a white flower and for a red flower. b) If a red-flowered plant is crossed with a white-flowered plant, what are the genotypes and phenotypes of the F1 generation plants? Show your work. c) What genotypes and phenotypes will be produced in the F2 generation? Show your work? the the o doa A t r th s beirs ard the phenorypic and wo ran aials pring fro d) How did the genotypic and phenotypic ratio compare to each other in this incomplete dominance cross? gonarypi and e) What would the phenotypic ratio have been if this had been complete dominance?
Determining Gene Order 1. We want to map the distance between genes E (tall height), B (blue flower color), and G (thick stalk). Each geen has a recessive allele (e= short, b= white and g= thin). (The actual configuration of the Trihybrid will be deduces as a part of the process) A. Your testcross genotypes will be (use slash notation). Female: ______ Male:______ Based on these results, are the genes linked or not? _______
Figure 1. Showing a homologous pair of chromosomes that carry two linked genes. Here we can see that one chromosome carries A and Balleles, while the other homologous chromosome carries a and b alleles. This is much more informative than just giving the genotype of AaBb. Another way to symbolize the arrangement of alleles on a chromosome is to give the symbols for alleles on one chromosome above a horizontal line, and the symbols for the alleles on the homologous chromosome below the horizontal line. For example: A Figure 2. Showing the arrangement of alleles for a pair of linked genes. Here we can see that, exactly like the example in Figure 1, one chromosome carries A and B alleles, while the other chromosome carries a and b alleles. 1. Suppose that Gene G and Gene D are linked. If the genotype of an organism is GGDD, use both types of symbols you learned in Figure 1 and Figure 2 above to show the arrangement of alleles for this organism.
4. What mode of inheritance is shown in the pedigree chart on the left? Justify your answer. 5. Construct pedigree charts using the inheritance of hemophilia in figure 92 (page 113). This is X-linked inheritance so you are required to label XX for females and XY for males. The gene responsible for the trait is represented by the superscript which should be specified in the legend.
Pedigree 2: A. What is the most likely mode of inheritance of this disease? Choose from: autosomal dominant, autosomal recessive, X-linked dominant, X-linked recessive. B State the genotypes of individuals # 1 #4. C If individual #3 has another daughter with the same partner, what is the probability that this daughter will be affected (show the disease)?
F₁ generation 1. Parents with the following homozygous genotypes for both traits were crossed in order to produce F₂ offspring. RRSS x rrss (Purple, Smooth) x (yellow, wrinkled) What types of gametes can each parent produce? RRSS rrss (Remember how we determine gamete combinations of genes located in non-homologous chromosomes) The gametes produced by the Purple, Smooth parent would be: RS RS RS RS First R and first S First R and second S Second R and first S = Second R and second S = The gametes produced by the yellow, wrinkled parent would be: First r and first s rs First r and second s Second r and first s Second r and second s rs rs rs 2. In the space provided below, make a Punnett Square using these parents. Determine the possible types of offspring (F₁ generation), and answer the following questions: What are the genotypes of the F₁ generation?__ What are the phenotypes of the F₁ generation?