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lilactiger299Lv1

28 Sep 2019

Q1) Which of the following chromosomal designations would be considered aneuploidy?

2n
4n, 2n+1 and 2n-1
4n only
2n+1 and 2n-1
2n+1 only
2n-1 only

Q2) Dicentric bridges and acentric fragments are produced during meiosis in a(n)

A. aneuploid

B. paracentric inversion heterozygote

C. paricentric inversion heterozygote

D. paracentric inversion homozygote

E. paricentric inversion homozygote

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Jamar FerryLv2

28 Sep 2019

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Related questions

Match the following genetic disorders with each definitions. Not all choices has to be used.

Unequal crossing over during meiosis causes the chromosome missing some genes
	Chromosomal mutations resulting in doubling of a part of a chromosome
	An inverted chromosomal segment fractured from a chromosome is inserted at the newly created sticky ends of the same chromosome.
	Breaks at the extreme ends of the short arms of two nonhomologousacrocentric chromosomes, and the small fragments produced are lost but the larger ones fuse together at their centromeric regions
	Turner syndrome (45X0) and Klinefeltersyndrome (XXY)
.	95% of Down syndrome cases
	Angelman syndrome
	3-4% of Down syndrome cases

A.	Recessive sex-linked disease
B.	Inversion
C.	Deletion
D.	Duplications
E.	Sex-chromosome aneuploidy
F.	Dominant sex-linked disease
G.	Autosomal dominant
H.	Translocation
I.	Autosomal aneuploidy
J.	Autosomal recessive

orchidhorse467

1. Chromosome morphology types include

: A. telocentric, in which the telomere is near one end of thechromosome. B. metacentric, in which the centromere is near one endof the chromosome. C. paracentric, in which the telomere issomewhat off center. D. telocentric, in which the centromere isnear one end of the chromosome. E. None of the above.

2. A karyotype is

: A. the set of chromosomes of an individual. B. 23 pairs. C. 46chromosomes. D. All of the above. E. None of the above.

3. Mutations that affect chromosome structure include all of thefollowing EXCEPT

: A. duplication. B. deletion. C. inversion. D. translation. E.Actually, all of these are mutations that affect chromosomestructure.

4.Duplications can have all of the following effects EXCEPT

: A. providing material for genetic variation and innovation. B.looping out of chromosomes during meiosis. C. novel phenotypes dueto dosage variation. D. suppression of crossing over. E. Actually,all of these can be effects of duplications.

5. Inversions:

A. include paracentric inversions, which include the centromere.B. include pericentric inversions, which do not include thecentromere. C. suppress crossing over in the inverted areas. D.usually lead to dicentric bridges. E. All of the above.

6. Translocations:

A. include reciprocal translocations, in which exchange ofchromosomal parts occurs. B. include nonreciprocal translocations,in which one chromosome donates material to another. C. suppresscrossing over in the case of reciprocal exchanges. D. can involveloss of material, as in Robertsonian translocations. E. All of theabove.

7. Unequal crossing over often leads to

: A. duplications. B. deletions. C. translocations. D. A and B.E. All of the above.

8. Aneuploidy includes all of the following EXCEPT:

A. nullisomy. B. monosomy. C. trisomy. D. tetrasomy. E.Actually, all of these are forms of anueploidy.

9. While anueploidy is a change in the number of chromosomes,polyploidy is:

A. a change in the number of sets of chromosomes. B. a change inthe structure of the chromosomes. C. an increase in the rate ofrecombination. D. an increase in the rate of mutation. E. None ofthe above.

10. Polyploidy includes:

A. autopolyploidy, which doubles the chromosome set as a resultof mitotic failure. B. autopolyploidy, which doubles the chromosomeset as a result of meiotic failure. C. allopolyploidy, whichdoubles the chromosome set as a result of meiotic failure. D. A andB. E. All of the above.

silverwolf483

6.A) If one follows 120 primary oocytes in an animal through their various stages of oogenesis, how many secondary oocytes would be formed?

B) How many first polar bodies would be formed?

C) How many ootids would be formed?

D) If one follows 120 primary spermatocytes in an animal through their various stages of spermatogenesis, how many secondary spermatocytes would be formed?

E) How many spermatids would be formed?

14. From which phase of the cell cycle does a cell enter G0 phase

21. Which of the following is true about the second meiotic division?

-The products are four identical gametes.

-Homologous chromosomes are pulling apart.

-Nondisjunction would lead to extra bivalents forming.

-Synapsis occurring in the second meiotic division.

-Sister chromatids are pulling apart.

23.Which if the following is true?

-Cells are 4n after S phase.

-Sister chromatids in mitosis are not identical.

-Cells are considered to be 2n after meiosis I.