Which of the following best describe(s) the process of X-inactivation? Group of answer choices It occurs because females have more genetic information than males. It occurs because males have more genetic information than females It occurs only in birds. It does not change the appearance inactivated chromosomes.

Which of the following best describe(s) the process of X-inactivation? Group of answer choices It occurs because females have more genetic information than males. It occurs because males have more genetic information than females It occurs only in birds. It does not change the appearance inactivated chromosomes.

Name: Which of the following best describe(s) the process of X-inactivation?
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Description: Which of the following best describe(s) the process of X-inactivation?Group of answer choicesIt occurs because females have more genetic information than males.It occurs because males have more genetic information than femalesIt occurs only in birds.

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter4: Pedigree Analysis In Human Genetics

Section: Chapter Questions

Problem 22QP: Analysis of X-Linked Dominant and Recessive Traits In the eighteenth century, a young boy with a...

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Which of the following statements regarding X-inactivation is TRUE?(posted) Inactivated X chromosomes are only found in somatic cells of females. After X-inactivation happens in a cell, all daughter cells resulting from mitotic events of that cell will have the same X chromosome ina none of the statements listed here are true X-inactivation is a random event that happens during human development right before a fetus is born. all of the statements listed here are true)
Why are X-linked conditions more common in men than in women? Group of answer choices 1. men acquire two copies of the defective gene during fertilization. 2. men need to inherit only one copy of the recessive allele for the condition to be fully expressed. 3. the sex chromosomes are more active in men than in women. 4. the genes associated with the sex-linked conditions are linked to the Y chromosome, which determines maleness.
If X inactivation in humans shuts down extra X chromosomes, why do XXY and XXX individuals display abnormal phenotypes? Group of answer choices Some X linked genes escape inactivation In trisomies, all the X chromosomes are shut down X inactivation can only shut down one X per cell The extra Barr body (condensed X) takes up physical space in the cell
Which of the following statements is TRUE? Overexpression of the X-chromosome in the somatic cells of males a. leads to the formation of a Barr body in male cells' nuclei. b. leads to cellular mosaicism in males hemizygous for an X-linked gene. c. is characteristic of all XY systems of sex determination. d. is the mechanism in flies to compensate for the higher dosage of X-linked genes in females as compared to males. e. None of the above
Which of the following statements is correct regarding the human X chromosomes? It is the same size as other chromosomes and has the same number of genes. It is present in every somatic cell of males and females. It carries genes that determine an individual's biological sex. It is referred to as an autosome.
X-linked traits are more common in males than females. Why?
Discuss the genetic determination of sex and the inheritance of X-linked genes in mammals.
Analysis of X-Linked Dominant and Recessive Traits In the eighteenth century, a young boy with a skin condition known as ichthyosis hystrix gravior was identified. The phenotype of this disorder includes thickening of skin and the formation of loose spines that are sloughed off periodically. This man married and had six sons, all of whom had the same condition. He also had several daughters, all of whom were unaffected. In all succeeding generations, the condition was passed on from father to son. What can you theorize about the location of the gene that causes ichthyosis hystrix gravior?
X-linked disorders (like hemophilia) are more likely to affect people of one gender than the other. Which gender is this, and why are x-linked disorders more likely to affect people of this gender?
In X-Linked Dominant disorder, a gene responsible for a genetic disorder is located on the X chromosome. Only one copy of the allele is sufficient to cause the disorder Group of answer choices Both statements are incorrect Both statements are correct. Statement 1 is incorrect, statement 2 is correct Statement 1 is correct. Statement 2 is incorrect
Which of the following could explain how might a human having the XX sex chromosomes can develop as a male? Both of his X chromosomes become inactivated giving rinse to a male. The autosomal Sox9 gene is inactivated in the male. This is not possible. His father suffered a chromosomal translocation in the reproductive cells that moved the SRY region to the X chromosome. The ratio of X chromosomes to haploid sets of chromosomes has been altered.
Under what condition might a human male have the XX sex chromosome complement? It is not possible. She has an X chromosome lacks an active Xist gene. He has an X chromosome that carries an SRY gene. He has a mutation that renders the SOX9 gene non-functional. He has a mutation that renders the SRY gene non-functional.