Final #2 Flashcards
In which phase of interphase is DNA duplicated?
S phase
By the end of prophase in mitosis, each of the following has occurred except
lining up of chromosomes in the middle of the cell
Unlike plant cells, animal cells contain
Centrioles
The longest phase of the cell cycle is
Interphase
A chromatid is attached to the spindle fiber by the
Centromere
Long, unorganized strands of DNA found in the nucleus during interphase are called
Chromatin
The process by which the cytoplasm divides separating the one cell into twos called
Cytokinesis
Crossing over occurs at which stage of meiosis?
Prophase I
An event that DOES NOT contribute to genetic variation
Mitosis
Events that DO contribute to genetic variation
Independent assortment
Crossing over
Random fertilization
Duing which phase of meiosis homologous pairs of chromosomes line up next to one another along
the equator?
Metaphase 1
Which of these amns desertbes two similar chromosomes that are inherited from each parent?
Homologous chromosomes
What occurs during the process of nondisjunction through meiosis in humans that can lead to a child with the condition of Down Syndrome?
Production of gametes with 1 duplicate chromosome
A phrase best describes the process of meiosis
Produces haploid gametes for genetic variation
Proteins are produced based on instructions from your_____which come from your____
Genes, DNA