Life Cycles Flashcards
What is a homologous pair?
A pair of the same kind of chromosome, have the same genes, BUT different variations of the same gene
Adult animal cells are _____ (ploidy) and the gametes are _______(ploidy).
Diploid
Haploid
Animal zygotes are _____ (ploidy) and ____cellular.
Diploid
Unicellular
Sporophytes are ______ (ploidy) and ____cellular.
Diploid
Multicellular
Sporophytes undergo ______ to become spores.
meiosis
Spores are _____ (ploidy) and ___cellular.
Haploid
Unicellular
Spores undergo _______ to become gametophytes.
Mitosis
Gametophytes are _____ (plodidy) and ___ cellular.
Haploid
Multicellular
Gametophytes undergo ______ to becomes gametes.
Mitosis
Plant gametes are _____ (ploidy) and ___cellular.
Haploid
Unicellular
Plant zygotes are ______ (ploidy) and ____cellular.
Diploid
Multicellular
What is the stage of life most fungi and many protists default to?
Haploid and multicellular
Haploid multicellular fungi undergo _____ to make gametes.
Miosis
Fungi gametes are _____ (ploidy) and ___cellular.
Haploid
unicellular
Fungi zygotes are _____ (ploidy) and undergo _______ to become haploid unicellular cells.
Diploid
Miosis
Meiosis _____ changes the ploidy level from diploid to haploid.*
Mitosis _____ changes the ploidy level.
Always
never
What happens in metaphase I?
Crossing over
What is a tetrad?
A pair of homologous chromosomes
What is cohesion in meiosis?
The sticking together of sister chromatids
What is a chiasmata?
the point where two homologous non-sister chromatids exchange genetic material during chromosomal crossover during meiosis
What two processes in meiosis allow for an increase in genetic diversity?
Independent assortment of chromosomes
Crossing over
