In mammals, the X and Y chromosomes contain different sets of genes. They are able to pair together during meiosis due to the presence of: Oheterosis O Barr bodies O androgen receptors O hemizygosity O pseudoautosomal regions

In mammals, the X and Y chromosomes contain different sets of genes. They are able to pair together during meiosis due to the presence of: Oheterosis O Barr bodies O androgen receptors O hemizygosity O pseudoautosomal regions

Name: 11 In mammals, the X and Y chromosomes contain different sets of genes
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Description: 11 In mammals, the X and Y chromosomes contain different sets of genes. They are able to pair togetherduring meiosis due to the presence of:heterosisO Barr bodiesO androgen receptorsO hemizygosityO pseudoautosomal regions

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter18: Cell Reproduction

Section: Chapter Questions

Problem 3SQ

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In meiosis, fully formed spindle fiber can be found in - O only Metaphase I in plant cells Metaphase I and Anaphase I in plant cells O Metaphase I and Metaphase II in only animal cells O Metaphase I and Metaphase II in only plant cells O only Metaphase I in animal cells O Metaphase I and Metaphase II in both plant and animal cells
Which of these are true statements about meiosis? Select all that apply O It results in cells that are genetically identical to the original cell It results in cells that are genetically different from each other and the original cell O It produces cells needed for sexual reproduction O It is the process by which multicellular organisms grow and develop O It produces cells with half as many chromosomes as the original cell
females infertility the germ line less one too many a normal amount of autosomes one too few death males sex chromosomes somatic cells Humans who have aneuploidy of the sex chromosomes are viable. A human who has Turner syndrome (XO) has the normal number of autosomes and will produce the normal amount of proteins from gene on autosomes. A person who is XO has one too few X chromosomes. A Barr body will not form. Most X chromosome genes produce a normal amount of protein. The few genes in the PAR region of the X chromosome remain active on all copies of the X chromosome. In Turner syndrome, those genes produce somatic cells than normal, leading to skeletal abnormalities. with protein in In the Barr body is normally reactivated. In individuals with Turner syndrome, the lower dose of X chromosome gene expression in the female germ line leads to defective oogenesis and
Meiosis produces daughter cells that are ; while mitosis produces daughter cells that are O Similar to each other and to the parent cell / Very different from each other and from the parent cell O Similar to each other and to the parent cell / Very different from each other and the parent cell O Very different from each other and from the parent cell /Very different from each other and from the parent cell. o Very different from each other and from the parent cell / Similar to each other and to the parent cell
Which of the following sentences is CORRECT: O Nuclear envelopes re-form in anaphase II Nondisjunction can occur in the meiosis I or meiosis II, or during mitosis During metaphase I the chromosomes move to the opposite poles of the cells is the site of phospholipids, lipids, and steroid synthesis O golgi appratus rough endoplasmic reticulum smooth endoplasmic reticulum
Which of the following statement is false about X chromosome inactivation in mammals? O It only occurs in males O It relies on chromatin remodeling O It involves histone modifications O It leads to the formation of Barr body
The segregation of chromosomes in cell division is a result of O the random way each pair of homologous chromosomes lines up at the metaphase plate during meiosis I O the random distribution of the sister chromatids to the two daughter cells during meiosis II O the random nature of the fertilization of ova by sperm O the random distribution of the homologous chromosomes to the two daughter cells during meiosis II O the random exchange of genetic material between homologous chromosomes
All of the following make melosis different from mitosis EXCEPT O chromosome number is reduced by half in melasis. O meiosis comprises two divisions. O pairing of homologous chromosomes usually only occurs melosis. O resulting cells from meiosis are genetically different from the parent cell. O meiosis lacks a preceding S phase
Arrange the following events of meiosis in the correct sequence * crossing over O synapsis terminalisation of chiasmata disappearance of nucleolus
Which of these is true for mitosis each daughter cell has 46 chromosomes it result in four daughters cells it has five phases resulting daughter cells are haploid in nature
In the life cycle of an animal, __________ are haploid and _________ are diploid gametes/ sex cells gametes/ somatic cells somatic cells/ gametes somatic cells/ sex cells body cells/ gametes
Synapsis ("crossing over") of the chromosomes occurs during (Check all that apply.) G2 Meiosis II Mitosis S - Phase G1 O Meiosis I