5 Written questions
5 Matching questions
- density dependent inhibition
- G2 phase
- a The second gap, or growth phase, of the cell cycle, consisting of the portion of interphase after DNA synthesis occurs.
- b A modified type of cell division in sexually reproducing organisms consisting of two rounds of cell division but only one round of DNA replication. It results in cells with half the number of chromosome sets as the original cell.
- c A cell containing only one set of chromosomes (n).
- d The phenomenon observed in normal animal cells that causes them to stop dividing when they come into contact with one another.
- e in a duplicated chromosome, the region on each sister chromatid where they are most closely attached to each other by proteins that bind to specific DNA sequences; this close attachment causes a constriction in the condensed chromosome.
5 Multiple choice questions
- A pair of chromosomes of the same length, centromere position, and staining pattern that possess genes for the same characters at corresponding loci. One is inherited from the organism's father, the other from the mother.
- The X-shaped, microscopically visible region where crossing over has occurred earlier in prophase I between homologous nonsister chromatids. they become visible after synapsis ends, with the two homologs remaining associated due to sister chromatid cohesion.
- The spread of cancer cells to locations distant from their original site.
- The period in the cell cycle when the cell is not dividing. During this phase, cellular metabolic activity is high, chromosomes and organelles are duplicated, and cell size may increase. often accounts for about 90% of the cell cycle.
- The diploid cell produced by the union of haploid gametes during fertilization; a fertilized egg
5 True/False questions
gametes → A haploid reproductive cell, such as an egg or sperm. unite during sexual reproduction to produce a diploid zygote.
gametophyte → In organisms (plants and some algae) that have alternation of generations, the multicellular haploid form that produces haploid gametes by mitosis. The haploid gametes unite and develop into sporophytes.
cytokinesis → The division of the cytoplasm to form two separate daughter cells immediately after mitosis, meiosis I, or meiosis II.
sex chromosomes → A chromosome that is not directly involved in determining sex; not a sex chromosome.
cell cycle → specific location of a gene on a chromosome