ZuoTi.Pro
Question

X-inactivation A).Occurs randomly in both males and females. B).Occurs in gamates just after their formation. C).Inactivates...

X-inactivation

A).Occurs randomly in both males and females.

B).Occurs in gamates just after their formation.

C).Inactivates only recessive alleles of genes on the X-chromosome.

D).May inactivate in either the paternal or maternal X-chromosome.

science   biology   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

1. Answer: Option D is correct
Explanation:
The X-inactivation is a random process in which the extra X-chromosome in an individual is inactivated to a Barr body.
XX = 1 Barr body
XY = 0 Barr body
XXY = 1 Barr body
XXX = 2 Barr bodies

It occurs in normal females. It does not occur in normal males.
It occurs after the diploid condition is established.
It inactivates both dominant and recessive alleles.

Please give a positive rating. Thank you

0 0
Add a comment
Know the answer?
Add Answer to:
X-inactivation A).Occurs randomly in both males and females. B).Occurs in gamates just after their formation. C).Inactivates...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • D Question 22 Identify a FALSE statement about X chromosomes: a) X chromosome inactivation occurs in...

    D Question 22 Identify a FALSE statement about X chromosomes: a) X chromosome inactivation occurs in all somatic cells of females. b) Xist inactivates only the maternally inherited X chromosome. The inactiveX chromosome is coated with Xist transcripts. di X chromosome inactivation does not occur in males. In early cleavage stage embryos, both X chromosomes are active.

  • X-chromosome inactivation is a phenomenon that A. establishes dosage compensation in mammals so that males and...

    X-chromosome inactivation is a phenomenon that A. establishes dosage compensation in mammals so that males and females express the same levels of genes on the X chromosome. B. is responsible for the fact that males in mammalian species are hemizygous. C. is observed in Drosophila so that males and females express the same levels of X chromosome gene products. D. Two of the above answers correctly finish the sentence.

  • Which of the following statements is TRUE about X inactivation? A. Inactivation of a particular X...

    Which of the following statements is TRUE about X inactivation? A. Inactivation of a particular X chromosome depends on its genetic content. Inactivated X chromosomes are in some way "marked" such that all clonally related cells (daughter cells) have the same X chromosome inactivated. B. Inactivation of an X chromosome occurs at random early in embryonic development. Inactivated X chromosomes are in some way "marked" such that all clonally related cells (daughter cells) have the same X chromosome inactivated. C....

  • Amounts of which of the components of cell cycle regulation vary with cell cycle phase? Cyclin-dependent...

    Amounts of which of the components of cell cycle regulation vary with cell cycle phase? Cyclin-dependent kinases Cyclins Checkpoints Kinetochores    The synaptonemal complex forms to facilitate pairing of homologous chromosomes during prophase of mitosis and meiosis. prophase of meiosis I and II. c.   prophase of meiosis I only. d. all stages of meiosis. Mendel’s Second Law of Independent Assortment refers to the separation of two identical alleles of the same gene. two different alleles of the same gene. alleles...

  • 1. Dosage compensation often occurs in species whose males and females A) differ in their autosome...

    1. Dosage compensation often occurs in species whose males and females A) differ in their autosome numbers. B) differ in their sex chromosome numbers. C) have the same number of autosomes. D) have the same number of sex chromosomes. 2. Extranuclear inheritance involves the inheritance of genes that are found in _____ and _____. A) nucleus B) mitochondria C) chloroplasts D) endoplasmic reticulum E) ribosomes

  • 7.) Haemophilia is an X-linked recessive disorder. If a male haemophiliac mates with a normal (non-haemophiliac)...

    7.) Haemophilia is an X-linked recessive disorder. If a male haemophiliac mates with a normal (non-haemophiliac) homozygous woman, would the progeny be affected? a. All males would be carriers. All females would be normal. b. All males would be normal. Half of the females would be carriers and half of the females would have haemophilia. c. All males would be normal. All females would be carriers. d. Half of each sex would be normal and half of each sex would...

  • Genetics question!! Please help with these 3. Thanks A woman with Turner syndrome (X0-only one X-chromosome)...

    Genetics question!! Please help with these 3. Thanks A woman with Turner syndrome (X0-only one X-chromosome) is also colorblind (an X-linked recessive phenotype). Both of her parents have normal color vision. This women's karyotype and genotype could have arisen by: a) a mutation in her mother's X-chromosome b) non-disjunction in mitosis c) non-disjunction in meiosis 1 in her father d) non-disjunction in meiosis 2 in her mother e) non-disjunction in meiosis 1 in her mother 10. Mitochondrial genomes a) replicate...

  • In Caenorhabditis elegans, the level of expression of genes on both X chromosomes of females is...

    In Caenorhabditis elegans, the level of expression of genes on both X chromosomes of females is reduced by half. What phenomenon is this an example of? A. extra-nuclear inheritance B. genomic imprinting C. dosage compensation D. paternal mitochondrial leakage

  • 1.a) How do we know that in humans the X chromosomes play no role in sex...

    1.a) How do we know that in humans the X chromosomes play no role in sex determination, while the Y chromosome causes maleness and its absence causes femaleness? c) How do we know that X chromosomal inactivation of either the paternal or maternal homolog is a random event during early development in mammalian females? d) How do we know that Drosophila utilizes a different sex-determination mechanism than mammals, even though it has the same sex-chromosome compositions in males and females?...

  • In a group of 45 people, 23 males and 22 females, each person has either high...

    In a group of 45 people, 23 males and 22 females, each person has either high blood pressure, a high level of cholesterol or both. If 10 females and 10 males have high blood pressure and 15 females have high level of cholesterol, and 2 males have both, then if a person is selected randomly from this group, what is the probability that (fraction only-reduced): a) the person have both? b) the person has high blood pressure? c) the person...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT