Download Past Cell Division FRQ`s

PAST MITOSIS/MEIOSIS FRQ’s
2016 #7
In a certain species of plant, the diploid number of chromosomes is 4 (2n=4). Flower color is controlled by
a single gene in which the green allele (G) is dominant to the purple allele (g). Plant height is controlled by
a different gene in which the dwarf allele (D) is dominant to the tall allele (d). Individuals of the parental
(P) generation with the genotypes GGDD and ggdd were crossed to produce F 1 progeny.
a) CONSTRUCT a diagram below to depict the four possible normal products of meiosis that would be
produced by the F1 progeny. Show the chromosomes and the allele(s) they carry. Assume the genes are
located on different chromosomes and the gene for flower is on chromosome 1.
b) PREDICT the possible phenotypes and their ratios in the offspring of a testcross between and F 1
individual and a ggdd individual.
c) If the two genes were genetically linked, DESCRIBE how the proportions of phenotypes of the
resulting offspring would most likely differ from those of the testcross between an F1 individual and a
ggdd individual.
2015 #4.
Both mitosis and meiosis are forms of cell division that produce daughter cells containing genetic
information from the parent cell.
(a) Describe TWO events that are common to both mitosis and meiosis that ensure the
resulting daughter cells inherit the appropriate number of chromosomes.
(b) The genetic composition of daughter cells produced by mitosis differs from that of the
daughter cells produced by meiosis. Describe TWO features of the cell division
processes that lead to these differences.
2011 B #1
The cell cycle is fundamental to the reproduction of eukaryotic cells.
(a) Describe the phases of the cell cycle.
(b) Explain the role of THREE of the following in mitosis or cytokinesis.
- Kinetochores
- Microtubules
- Motor proteins
- Actin filaments
(c) Describe how the cell cycle is regulated and discuss ONE consequence of abnormal regulation.
2006B #1
Sexual reproduction requires that half of the chromosomes in a zygote come from one parent and the
other half from the second parent.
a) DESCRIBE the process by which a germ cell's complement of chromosomes is halved in the
formation of gametes.
b) Choose ONE organism or group of organisms that reproduce asexually. DESCRIBE the
mode of asexual reproduction in that organism and explain the advantages to the
organism of asexual reproduction.
c) Choose ONE organism or group of organisms that reproduce sexually. DESCRIBE the
mode of sexual reproduction in that organism and explain the advantages to the
organism of sexual reproduction.
2004 #1
1. Meiosis reduces chromosome number and rearranges genetic information.
a) EXPLAIN how the reduction and rearrangement are accomplished in meiosis.
b) Several human disorders occur as a result of defects in the meiotic process.
IDENTIFY ONE such chromosomal abnormality; what effects does it have on the
phenotype of people with the disorder?
DESCRIBE how this abnormality could result from a defect in meiosis.
c) Production of offspring by parthenogenesis or cloning bypasses the typical meiotic process.
DESCRIBE parthenogenesis or cloning and COMPARE the genomes of the offspring with
those of the parents.