WorksheetsMeiosis and Genetic Variation Quiz
Total questions: 6
Worksheet time: 3mins
What aspects of chromosomal structure allow crossing over to occur?
Tetrad formation during meiosis I of homologous chromosomes and their sister chromatids
The locus of each gene being the same on its corresponding chromosome, with only the specific allele differing
All chromosomes having the same genes as all other chromosomes in the cell
Two of the above
A gamete that has undergone a nondisjunction event in an autosomal chromosome is (N + 1) with 24 chromosomes. That gamete is fertilized by a normal gamete (N) with 23 chromosomes. Which disorder is most likely to occur in the resulting offspring?
Down syndrome (Trisomy 21)
Turner syndrome (Monosomy)
Trisomy X
Where must mutations occur in order to contribute to genetic variation?
Germ cells
Autosomal chromosomes
Sex chromosomes
Somatic cells
A mutation event occurs in the germ cells causing gene A and gene B to switch their order on chromosome 2. What type of mutation would this be classified as?
Deletion
Duplication
Inversion
Reciprocal translocation
The gametes produced in this image are genetically different because of:
Crossing Over
Independent Assortment
Fertilization
Two of the above
All of the above
You have discovered a novel (new) genetic disease but need to investigate what the exact cause is. Of the following, which is the most likely to have contributed to the genetic variation that is causing the disease?
Crossing over
Chromosomal aberrations
Genetic mutations
Nondisjunction events
