Table of contents

1. Introduction to Genetics(0)
2. Mendel's Laws of Inheritance(0)
3. Extensions to Mendelian Inheritance(0)
4. Genetic Mapping and Linkage(0)
5. Genetics of Bacteria and Viruses(0)
6. Chromosomal Variation(0)
7. DNA and Chromosome Structure(0)
8. DNA Replication(0)
9. Mitosis and Meiosis(0)
10. Transcription(0)
11. Translation(0)
12. Gene Regulation in Prokaryotes(0)
13. Gene Regulation in Eukaryotes(0)
14. Genetic Control of Development(0)
15. Genomes and Genomics(0)
16. Transposable Elements(0)
17. Mutation, Repair, and Recombination(0)
18. Molecular Genetic Tools(0)
- Genetic Cloning
  (0)
- Methods for Analyzing DNA
  (0)
19. Cancer Genetics(0)
- Overview of Cancer
  (0)
- Cancer Mutations
  (0)
20. Quantitative Genetics(0)
21. Population Genetics(0)
- Hardy Weinberg
  (0)
- Allelic Frequency Changes
  (0)
22. Evolutionary Genetics(0)

6. Chromosomal Variation

Chromosomal Mutations: Aberrant Euploidy

6. Chromosomal Variation

Chromosomal Mutations: Aberrant Euploidy - Online Tutor, Practice Problems & Exam Prep

Chromosomal Mutations: Aberrant Euploidy Practice Problems

25 problems

Octaploid strawberries have brighter red color, and a juicier and sweeter taste when compared to normal strawberries. How many chromosomes do commercial octoploid varieties contain if normal strawberries have a haploid number of n = 7 chromosomes?

2PRACTICE PROBLEM

Defects in the meiotic process are the cause of several human disorders. Which of the following is the most common chromosomal abnormality disorder?

3PRACTICE PROBLEM

Down syndrome is caused by the presence of an extra copy of chromosome 21. The extra genetic material leads to the overexpression of certain genes, which can result in the characteristic features of Down syndrome.
Which gene is overexpressed when there is a buildup of beta-amyloid protein, which is associated with the development of Alzheimer's disease?

4PRACTICE PROBLEM

What is the location and the example of genes found within the Down Syndrome Chromosome Region?

5PRACTICE PROBLEM

A variety of potato is produced with 60 chromosomes by crossing a tetraploid line with 48 chromosomes with a hexaploid line that contains 72 chromosomes. Determine the number of chromosomes contributed by the hexaploid line.

6PRACTICE PROBLEM

7PRACTICE PROBLEM

Polyploids of plant species frequently occur naturally and are also produced by human manipulation. Which of the following polyploid plant species with increased chromosome numbers is incorrect?

8PRACTICE PROBLEM

A new species of salt grass, Spartina anglica was created by interspecific hybridization of native salt grass, Spartina maritima (2n = 60), with a non-native salt grass, Spartina alterniflora (2n = 62). How many chromosomes will the polyploid have after chromosome doubling?

9PRACTICE PROBLEM

Which of the following statements regarding polyploidy is true?

10PRACTICE PROBLEM

Which of the following statements regarding the numerical chromosomal aberration is incorrect?

11PRACTICE PROBLEM

A chromosomal aberration is any kind of change in the structure and number of chromosomes caused by certain irregularities during cell division. The followings types are all structural aberrations except:

12PRACTICE PROBLEM

Hexaploidy is a condition where an organism has six sets of chromosomes. Which of the following is an example of a hexaploid organism?

13PRACTICE PROBLEM

Fusion of two diploid sets of chromosomes results in a _______cell.

14PRACTICE PROBLEM

In animals, triploidy frequently leads to:

15PRACTICE PROBLEM

Which of the following is an impact of octaploidy in agriculture?

16PRACTICE PROBLEM

The presence of five sets of chromosomes in a cell is called pentaploidy. What is the main cause of pentaploidy?

17PRACTICE PROBLEM

In a diploid organism, expression of deleterious mutations is suppressed because:

18PRACTICE PROBLEM

Which of the following statements correctly describes polyploidy?

19PRACTICE PROBLEM

A condition in which an individual has three copies of a chromosome instead of two is called:

20PRACTICE PROBLEM

During synapsis in prophase I of meiosis, homologous chromosomes pair up to form bivalents, which are held together by the synaptonemal complex. How many bivalents will a diploid species with 40 chromosomes produce?

21PRACTICE PROBLEM

The genome of cultivated cotton, Gossypium arboreum, reveals that it is a/an _____ species.

22PRACTICE PROBLEM

________ occurs when a person has more than two copies of the same set of chromosomes, whereas ________ happens when a person has more than two copies of chromosomes derived from different taxa.

23PRACTICE PROBLEM

The reason behind sterile hybrid plants is due to failure in gamete pairing during fertilization, which of the following correctly describes said failure:

24PRACTICE PROBLEM

Which of the following can be a possible result of allopolyploidy in plants?

25PRACTICE PROBLEM

Changes in chromosomal structure or number are referred to as:

Next Topic: Chromosomal Mutations: Aneuploidy