Mitosis And Meiosis Flashcards
What is a p arm?
Short arm of chromatid
What is the q arm?
Long arm of chromatid
What is a telomere?
Repeated sequences at each end of a chromosome or chromatid
What is a centromere?
Repetitive sequence that links sister chromatids
What are the positions of centromeres called?
Metacentric- middle
Submetacentric
Afrocentric
Telcentric- top
How are chromosomes grouped?
According to size and shaped
In groups A-G
What is mitosis?
Cell division in somatic cells
Produces two identical daughter cells
What tissues is mitosis necessary for?
Epidermis
Mucosae
Bone marrow
Spermatogonia
What occurs in prophase?
Spindle fibres appear
chromosomes condense
Nuclear membrane breaks down
What occurs in prometaphase?
Spindle fibres attach to chromosomes
Chromosomes condense
What happens in metaphase?
Chromosomes align at the equator
What happens at anaphase?
Centromeres divide
Sister chromatids move to opposite poles
What happens in telophase?
Nuclear membrane reforms
Spindle fibres disappear
Chromosomes decondense
What happens in cytokinesis?
Cytoplasm divides
2 genetically identical daughter cells form
What are alleles?
Different forms of the same gene