1). Barring (vertical stripes) in "Antimony Fish" resultsfrom a genetic maternal effect. White bars (W+) aredominant over black bars (w). Lucy is a black barredprotandrous sequential hermaphrodite Antimony fishthat resides in the University Aquarium. Lucy has activelyreproduced both before and after changing sex. Indicatewhich of the following statements are TRUE or FALSE.a) Lucy's genotype must be ww.b) Lucy's genotype cannot be W+W+.c) All of the offspring produced by Lucy since changingsex must be black barred.d) At least some of offspring produced by Lucy beforechanging sex must be black barred.e) Lucy's mother must have been black barred.f) All of Lucy's brothers must be black barred.

Here's an explanation of each statement: a) Lucy's genotype must be ww.True: Since Lucy has black…

Answered: 1). Barring (vertical stripes) in…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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why is it that a genotype of XXX may not cause any problems for human female?
The term heterozygous means; a) An organism has two different sex chromosomes Ob) An organism was originally twins that fused together in the zygote stage c) An organism has two identical alleles for a given gene d) An organism has two different alleles for a given gene
What causes most of the phenotypic abnormalities in someone with Down's Syndrome? A) They have many gene mutations that produce nonfunctional proteins. B) They express too much of some proteins during development. C) Their cells cannot go through mitosis properly during development because they have an odd number of chromosomes. D) Their chromosomes cannot pair during meiosis.
A scientist working with Drosophila flies studies wing length, an X-linked characteristic. He has pure-breeding lines of short-winged and long-winged flies available. He decides to use reciprocal crosses for his work.i) What are reciprocal crosses? ii) Provide an example of the reciprocal crosses this scientist will do.iii) If the gene for wing length was sex-linked, but present in the pseudoautosomal region, what would you expect the outcome of a reciprocal cross to be with regards to males and females?
Chorionic villus sampling (CVS) is used to test for genetic disorders in the fetus and can be performed early in gestation (8-10 wks). The recommended method of CVS is to sert a probe with a needle on the end through the cervix and remove a small sample of e chorionic villi to be analyzed. Which description is a correct description of chorionic villi? Select one: They are found in the digestive tract of the fetus. They are developed from the endometrium. They contain cells whose nuclei differ genetically from cells of the fetus. They form part of the placenta.
Additional problems (Chapter 4 (Extension of Mendelian Inheritance): 1. In rabbits, coloration of the fur depends on alleles of the gene c. From information given in the chapter, what phenotypes and proportions would be expected from the following crosses: a) CC X cc b) Cc x Cc c) Cc x Ccch d) cc x cc 2. From the information given in the chapter about the ABO blood types, what phenotypes and ratios are expected from the following matings: a) type AB x type O b) Type AB x type B individual whose mother is type O c) Type O x Type A individual whose father is type O d) Type Ox type O 3. A woman with type AB blood type gave birth to a baby with type B blood. Two different men claim to be the father. One has type A blood and the other type B blood. Can the genetic evidence decide in favor of either? 4. You have been studying a trait that seems to be present in every generation within a particular family. Further, you have observed that every affected offspring has at least affected parent…
Choice 2: Black versus orange fur is determined by two alleles an X-linked gene (XⓇ, Xº), Suppose that a black male is mated with an orange female. a) Write the genotypes of the male and female cats. Male: Female: b) What genotypes & phenotypes are expected among the offspring (F1) of these parent cats? c) Suppose that a male and a female from part b mate. What offspring types will they produce?
An individual with 46, XX genotype is diagnosed with Duchenne-type Muscular Dystrophy, a recessive X-linked disorder. Genetic tests confirm that this individual is a heterozygote for this disorder. Briefly, but specifically, explain how it’s possible that they are showing symptoms of this disorder.
Males of many diploid species (like us) have X and Y sex chromosomes. They are hemizygous for most X- linked genes. Thus, males express most X-linked alleles, whether they are dominant or recessive in females. In the fruit fly Drosophila, it is common to achieve the equivalent of a test cross of X-linked genes in females by assessing the readily observed phenotypes of their male progeny. Since males do not receive X-linked genes from their father, sires of these crosses can be normal or wild-type flies. In fly genetics, it is conventional to name a gene after the mutant phenotype that enabled its discovery. Your challenge is to establish gene order and map distances between three X-linked genes in Drosophila. Each gene is represented by recessive mutant alleles that express rather distinctive phenotypes relative to their dominant wild-type alternative alleles. Flies expressing fruitless (f) are bisexual, lush (1) have a heightened responses to ethanol, and ken&barbie (kb) lack external…
How is it possible Jonathan has the dominant disorder, Huntington’s Disease, if none of his family had it? a) The mutant allele remained ‘hidden’ in previous generations. b) He is homozygous for mutant huntingtin alleles unlike his grandparents, who are clearly heterozygous for the condition. c) The appearance of Huntington Disease in him might be the result of a new mutation appearing during his lifetime. d) His parents and grandparents were ashamed to admit they had it.
What is/are the possible genotype(s) of this cat for the Sex-linked Red gene? If this cat only has two sex chromosomes, what sex is this cat? Q67 Sex-linked red gene: determines red or not red color; located on X chromosome 2 alleles: Xo (red color) X+ (non-red color) MacBook Air
In humans, an X-linked disorder called coloboma iridia (a fissure in the iris_ is a recessive trait. A normal couple has an afflicted daughter. What would be the most plausible scenario for this situation? the female is not the biological mother, but the male is the biological father the father carries one recessive allele, and the mother carries one recessive allele the mother carries two recessive alleles the male is not the biological father, but the female is the biological mother both parents are heterozygous for the trait

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