BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 53, Problem 5DA
Summary Introduction
To determine: The inheritance pattern between the families.
Introduction: The types ofgenes of offspring can be determined through sex determination technology. The haploid chromosomes are the chromosomes that can carry only a single allele for the gene expression.
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female
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genotype. If nondisjunction occurs during the first mitosis the left
cell will have the
genotype and develops to the
half. The right
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genotype and develops to the
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XXX
XY
In C. elegans there are two sexes: hermaphrodite and male. Sex is determined by the ratio of X chromosomes to haploid sets of autosomes (X/A). An X/A ratio of 1.0 produces a hermaphrodite (XX), and an X/A ratio of 0.5 results in a male (XO). In the 1970s, Jonathan Hodgkin and Sydney Brenner carried out genetic screens to identify mutations in three genes that result in either XX males (tra-1, tra-2) or XO hermaphrodites (her-1). Double-mutant strains were constructed to assess for epistatic interactions between the genes (see table). Propose a genetic model of how the her and tra genes control sex determination.
Chapter 53 Solutions
BIOLOGY
Ch. 53.1 - Prob. 1LOCh. 53.1 - Prob. 2LOCh. 53.1 - Prob. 3LOCh. 53.2 - Prob. 1LOCh. 53.2 - Prob. 2LOCh. 53.3 - Prob. 1LOCh. 53.3 - Prob. 2LOCh. 53.3 - Prob. 3LOCh. 53.4 - Prob. 1LOCh. 53.4 - Prob. 2LO
Ch. 53.4 - Prob. 3LOCh. 53.5 - Prob. 1LOCh. 53.5 - Prob. 2LOCh. 53.5 - Prob. 3LOCh. 53.6 - Prob. 1LOCh. 53.7 - Define migration.Ch. 53.7 - Prob. 2LOCh. 53.7 - Prob. 3LOCh. 53.8 - Prob. 1LOCh. 53.8 - Prob. 2LOCh. 53.8 - Prob. 3LOCh. 53.9 - Prob. 1LOCh. 53.9 - Prob. 2LOCh. 53.10 - Prob. 1LOCh. 53.10 - Prob. 2LOCh. 53.11 - Prob. 1LOCh. 53.11 - Prob. 2LOCh. 53.11 - Prob. 3LOCh. 53.12 - Prob. 1LOCh. 53.12 - Prob. 2LOCh. 53.12 - Prob. 3LOCh. 53.13 - Prob. 1LOCh. 53.13 - Prob. 2LOCh. 53.13 - Prob. 3LOCh. 53 - Prob. 1DACh. 53 - Prob. 2DACh. 53 - Prob. 3DACh. 53 - Prob. 4DACh. 53 - Prob. 5DACh. 53 - Prob. 1IQCh. 53 - Prob. 2IQCh. 53 - Prob. 3IQCh. 53 - What factors might be responsible for the slight...Ch. 53 - Prob. 1UCh. 53 - Prob. 2UCh. 53 - The study of song development in sparrows showed...Ch. 53 - Prob. 4UCh. 53 - Prob. 5UCh. 53 - Prob. 6UCh. 53 - Prob. 7UCh. 53 - Prob. 8UCh. 53 - In the haplodiploidy system of sex determination,...Ch. 53 - Prob. 10UCh. 53 - Prob. 11UCh. 53 - Prob. 1ACh. 53 - Refer to figure 54.25. Six pairs of birds were...Ch. 53 - Prob. 3ACh. 53 - Prob. 1SCh. 53 - Behavioral genetics has made great advances from...Ch. 53 - If a female bird chooses to live in the territory...
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- One reason that worker bees forgo their own reproduction to help their sister (the queen) reproduce is that female bees are more closely related to their sisters than they are to their own offspring. This quirk of genetics results from the fact that bees have haplodiploid sex determination, in which females are diploid, with a mother and a father, but males are haploid, developing from unfertilized eggs. Because males are haploid, they produce sperm by mitosis. Explainwhy haplodiploid sex determination causes females to be more closely related to their sisters than to their offspring.arrow_forwardSuppose that you found a species S. ambivala that is closely related to S. latifolia, such that they share the same Y chromosome marker. However, S. ambivala is hermaphroditic. What would you expect to see on your gel, if you had taken twenty randomly chosen S. ambivala plants, and performed the same experiment?arrow_forwardHow many homologous pairs of chromosomes would be in the zygote if it were a male organism? Explain.arrow_forward
- Plutonian Tickle-bellies have a sex determination system just like mammals. Hairy Snout is a holandric trait (carried on the Y chromosome). MyxRotcccc, a handsome male Tickle-belly, has lovely orange hair on his snout. He and his mate, OrgggWny, have six offspring, three boys and three girls. Please answer the following questions about this family. How many of MyxRotcccc’s and OrgggWny’s offspring have hairy snouts? Can you predict which ones? Their eldest son, Bob, marries and has a son. What is the chance that Bob’s son will also have a hairy snout? JoKchew, MyxRotcccc’s and OrgggWny’s youngest daughter, marries a male who has a smooth, hairless purple snout. She has eight offspring, each one lovelier than the last, and all boys. What percentage of these offspring do you expect to have hairy snouts? Explain.arrow_forwardIdentify the stage of meiosis diploid cells of this species have 3 homologous pairs of chromosomes a b and ca) prophase b) telophase c) anaphase d) prophase 2 e) telophase 2Activation of the adrenal cortex produce androgens is called adrenarche ? True/falseHow does photosynthesis relate to cellular aerobic respiration?arrow_forwardIn eukaryotic reproduction two haploid gametes fuse together to produce a diploid zygote which will grow into a new living organism with characteristics from both parents. true or false?arrow_forward
- Why must the life cycle of sexually reproducing species alternate between haploid and diploid stages? A) Mitosis must occur at some point in the life cycle to prevent a doubling of chromosomes in each generation. B) Meiosis must occur at some point in the life cycle to prevent a doubling of chromosomes in each generation. C) Mitosis must occur at some point in the life cycle to prevent a reduction of chromosomes in each generation. D) Meiosis must occur at some point in the life cycle to prevent a reduction of chromosomes in each generation.arrow_forwardThe diagram below illustrates the lifecycle of the parasite - Toxoplasma gondii. This single celled organism causes the disease, Toxoplasmosis, which can be transferred to humans when cleaning out litter boxes. Which of the following rows correctly identifies the processes 1, 2, and 3 numbered above? Select one: a. Process 1 Process 2 Process 3 Meiosis Fertilization Mitosis b. Process 1 Process 2 Process 3 Mitosis Fertilization Meiosis c. Process 1 Process 2 Process 3 Meiosis Mitosis Fertilization d. Process 1 Process 2 Process 3 Fertilization Mitosis Meiosisarrow_forwardIdentify which of the following statements is a lie?Select one: a. Budding yeasts first start from being a haploid cell and further becomes a diploid cell. b. Budding yeasts secrete a signaling molecule called a “mating factor”. c. The mating factor in the sexual reproduction of yeast is directed to all yeast cells in the vicinity.arrow_forward
- In some mites, males pass genes to their grandsons, but they never pass genes to their sons. Explain.arrow_forwardIf red vizcacha rats (Tympanoctomys barrerae) have 100 autosomes and 2 sex chromosomes in each of their diploid somatic cells, then they must have: only 102 chromosomes in their haploid germ cells only 100 chromosomes in their haploid germ cells only 52 chromosomes in their haploid germ cells only 51 chromosomes in their haploid germ cells only 50 chromosomes in their haploid germ cellsarrow_forwardPlasmogamy is the fusion of(a) two haploid cells including their nuclei.(b) two haploid cells without nuclear fusion.(c) sperm and egg.(d) sperm and two polar nuclei. Please try to break the solutions into as many steps as practically possible and the steps should come one by one and they should be short and crisp and plagiarism-free.arrow_forward
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