Question

What causes a change in the chromosome number of an organism? A. mutation B. crossing over...

What causes a change in the chromosome number of an organism?

A. mutation B. crossing over C. translocation D.non dysjunction

Homework Answers

Answer #1

Answer-

D) Nondisjunction causes a change in the chromosome number of an organism.

Nondisjunction is an abberration of cell division in which chromosomes or chromatids that normally separate during anaphase remain together, resulting in daughter cells with too many or too few chromosomes.

Translocation is a kind of chromosomal rearrangement in which a block of genes from one linkage group is transferred to another linkage group. So, it involves changes in the arrangement of gene loci. Mutation is the changes in the nucleotide bases of chromosomes. Crossing over is defined as the recombination of linked genes brought about as a result of interchange of corresponding parts between the nonsister chromatids of a homologous chromosome. These three events do not cause a change in chromosome number. They are responsible for the changes in chromosome structure.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
a) Explain different types of gene and chromosome mutation b) Explain the possible causes of gene...
a) Explain different types of gene and chromosome mutation b) Explain the possible causes of gene and chromosome mutation c) Judge why gene mutations are often less severe than chromosome mutations.
6) Suppose a diploid organism contains the chromosomes A*B$C and a*b$c (homologs of chromosome 2), and...
6) Suppose a diploid organism contains the chromosomes A*B$C and a*b$c (homologs of chromosome 2), and also the chromosomes D$E*F, and d$e*f (homologs of chromosome 11. ($ represents a repetitive region of DNA that is prone to recombination, while * represents the centromere). What normal gametes is chromosome 2 capable of producing (assuming no linkage)? a) Assuming the gametes created for each chromosome are independent of each other (remembering that a normal cell gets a normal version of chromosome 2...
Which event can directly produce one chromosome containing both maternal and paternal genes? a. crossing-over and...
Which event can directly produce one chromosome containing both maternal and paternal genes? a. crossing-over and independent assortment b. one chromosome can never have genes from both parents c. independent assortment only d. crossing-over only
1) What is the importance of crossing over in meiosis? a. Crossing over results in the...
1) What is the importance of crossing over in meiosis? a. Crossing over results in the correct orientation of chromosomes during anaphase. b. Crossing over results in both sets of parents being upset at their offspring for being annoying. c. Crossing over results in genetic recombination and diversity within a species. d. Crossing over results in division of chromosomes during telophase of mitosis 2) What does meiosis result in? a. Meiosis results in halving the number of chromosomes that were...
A karyotype would be useful in detecting: A. a point mutation. B. congenital birth defects. C....
A karyotype would be useful in detecting: A. a point mutation. B. congenital birth defects. C. which allele is present on a specific chromosome. D. a translocation of one arm of a chromosome.
In a fictitious organism, the diploid (2N) chromosome number is 12. Fill in the following table...
In a fictitious organism, the diploid (2N) chromosome number is 12. Fill in the following table for type of chromosome number variation, number of chromosomes in an individual, or chromosome complement formula as needed. Type of variation Chromosome number Chromosome comp. formula Diploid 12 2N Monosomic 13 2N + 1 Double trisomic 6 3N Autotetraploid 4N
A mutation that causes a disruption in the optic chiasm wiring (specifically a decrease in the...
A mutation that causes a disruption in the optic chiasm wiring (specifically a decrease in the nerves crossing at the optic chiasm) is common in cats. But the cats are able to function normally by crossing their eyes, why do they have to make this specific behavioral change? 2) A person had an ischemic stroke and mainly had severely slurred speech. What area of the brain and what hemisphere do you hypothesize that the stroke took place?
During meiosis, if crossing over occurs between a chromosome carrying an inversion and its homologue which...
During meiosis, if crossing over occurs between a chromosome carrying an inversion and its homologue which doesn't carrying inversions, this may result in a formation of daughter chromosomes carrying duplications and deletions. true or false
A diploid organism has a chromosome number 2n=6. How many chromatids will be present in each...
A diploid organism has a chromosome number 2n=6. How many chromatids will be present in each daughter cell after meiosis?
What organism causes rheumatic fever? How does it cause damage to the heart tissue? What is...
What organism causes rheumatic fever? How does it cause damage to the heart tissue? What is another disease that this organism causes?m