Chapter 8 Flashcards
what is the role of meiosis in sexual reproduction?
Genetic variation associated with sexual reproduction comes from the process by which gametes are produced
what is the basic role of Interphase (G1,S,G2) in the cell cycle?
increases mass, doubles cytoplasmic components, replicates DNA
what is the basic role of mitosis in the cell cycle?
maintains chromosome number
diploid
Two copies of each chromosomes
haploid
cells only have one copy of each chromosome in the nucleus
spindle apparatus
moves chromosomes during nuclear division, consists of microtubles
neoplasm
accumulation of abnormally dividing cells
metastasis
process where cancer cells spread
alleles
forms of a gene with slightly different DNA sequences
crossing over
homologous chromosomes exchange corresponding segments during meiosis
homologous chromosomes
paired chromosomes with same length, shape and set of genes
cytokenesis
division of cytoplasm to form two new daughter cells
benign
cells adhere
malignant
cells migrate
chiasmata
chromatids from each homolog can cross over one another.. the point of overlap
