For each of the following, identify what characteristics of a species male and female karyotype would indicate that mechanism of sex-determination. In each case, list a characteristic that would be specific to only that sex-determination system if possible. If no such characteristic is possible, specify which other sex-determination system would show the same karyotype characteristic. (A) Genic

For each of the following, identify what characteristics of a species male and female karyotype would indicate that mechanism of sex-determination. In each case, list a characteristic that would be specific to only that sex-determination system if possible. If no such characteristic is possible, specify which other sex-determination system would show the same karyotype characteristic. (A) Genic

Name: For each of the following, identify what characteristics of a species
Uploaded: 2024-03-20T06:42:55.000Z
Channel: Bartleby
Description: For each of the following, identify what characteristics of a species male and female karyotype would indicate that mechanism of sex-determination. In each case, list a characteristic that would be specific to only that sex-determination system if p

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter11: Meiosis: The Cellular Basis Of Sexual Reproduction

Section: Chapter Questions

Problem 2ITD

See similar textbooks

Similar questions

In reptiles, sex determination was thought to be controlled by sex-chromosome systems or by temperature-dependent sex determination without an inherited component to sex. But as we discussed in section 7.6, in the Australian lizard, Pogona vitticeps, it was recently revealed that sex is determined by both chromosome composition and by the temperature at which eggs are incubated. What effects might climate change have on temperature- dependent sex determination in this species, and how might this impact the sex ratio for this species in subsequent generations?
Most organisms with XX-XY sex determination have pseudoautosomal regions, portions of the X and Y chromosomes that are homologous. Would you predict that organisms with ZZ-ZW sex determination have pseudoautosomal regions of homology between Z and W chromosomes? Explain your answer.
Generally, sex chromosomes in male mammals are XY and females are XX. Followingmeiosis and gamete production, and assuming there are no chromosome mutations, what is thefrequency of the genotypes of all possible gametes, and what should be the sex ratio of alloffspring produced within a population?
Do all dioecious species have a homogametic and a heterogametic sex? 1. Yes, because dioecious means that two types of gametes are produced, even in hermaphroditic species. 2. Yes, because all sex-determining systems include heterogametic and homogametic sexes. 3. Yes, because in dioecious organisms, either the XX-XY or the ZZ-ZW system determines sex. XY and ZW individuals are heterogametic. XX and ZZ individuals are homogametic. 4. No, because hermaphrodites and species that reproduce asexually are dioecious. 5. No, because dioecious means that the sexes are separate, regardless of how sex is determined. In some dioecious species, sex is determined by a single gene.
Which of the following findings supports the fact that the presence of the Y-chromosome rather than the lack of a second X-chromosome determines the development of maleness in mammals? a. A human with an X0 genotype (Turner syndrome) is phenotypically female. b. A human with an XXY genotype (Klinefelter syndrome) is phenotypically male. c. A transgenic mouse with two X-chromosomes and the SRY gene from the Y-chromosome develops male sex organs. d. b and c, but not a e. a, b, and c
Organisms have the following genotypes. What types of gametes will these organisms produce, and in what proportions?a. Aabbb. AABbc. AaBb Given the following matings, what are the predicted phenotypic ratios of the offspring? Use a branch diagram to show the phenotypic ratio. a. AABb x Aabb
About 40% of Solomon Islanders carry a gene for blond hair, and yet only 5%–10% of these people actually have blond hair. Why is the number of people with blond hair only 5%–10% when so many people carry genes for blond hair? The duck-billed platypus has a unique mechanism of sex determination: females have five pairs of X chromosomes (X1X1X2X2X3X3X4X4X5X5) and males have five pairs of X and Y chromosomes (X1Y1X2Y2X3Y3X4Y4X5Y5). Do you think each of the X and Y chromosome pairs in males assort independently of other X and Y pairs during meiosis? Why or why not? How is the inheritance of X-linked traits different from the inheritance of autosomal traits? How is the inheritance of X-linked and autosomal traits similar? List as many differences and similarities as you can.
The primrose, Primula kewensis, has 36 chromosomes that are similar in appearance to the chromosomes in two related species, P. floribunda (2n = 18) and P. verticillata (2n = 18). How could P. kewensis arise from these species? How would you describe P. kewensis in genetic terms?
The Amami spiny rat (Tokudaia osimensis) lacks a Y chromosome, yet scientists at Hokkaido University in Japan have reported that key sex-determining genes continue to be expressed in this species. Provide possible explanations for why male differentiation can still occur in this mammalian species despite the absence of a Y chromosome.
How do the chromosomal mechanisms determining sex differ in the three taxa males of bugs, humans, and butterflies?
Consider these two crosses and assume that independent segregation is exhibited by all gene pairs: RrmmTT x RRMmTtFfGg x FfGg Derive the gametic ratio of the second parent in each cross using the branching method. What proportion of the offspring in each cross will be heterozygous for all gene pairs? Derive the genotypic ratio for the offspring from each cross using the branching method. Show complete solutions.
Genetics, Mating took place between males and females of a fruit fly, and individuals appeared With the following proportions and attributes: 25% Female flies with irregular wings and 25% female flies with irregular wings 25% male flies with irregular wings and 25% male flies with irregular wings . . If a symbol for the adjective of regular wings is symbolized by the symbol B and if a symbol for irregular wings with the symbol b, The genotypes of the parents are? 1. bB, Bb 2. bb,Bb 3. XB Y, Xb Xb 4. XbY, XBXb