c16 meiosis sb Flashcards
(16 cards)
in humans, the cells that contain only 23 chromosomes are called
gametes
which two key events occur at the beginning of meiosis but not mitosis?
- formation of bivalents
- crossing over
homologous chromosomes are separated from each other during _____
meiosis 1 only
in what phase of meiosis are sister chromatids separated?
anaphase 2
which of the following statements correctly compare mitosis and meiosis?
- sister chromatids are separated during both mitosis and meiosis
- crossing over occurs in meiosis but not normally in mitosis
when two haploid gametes unite, they create a diploid cell called a(n)
zygote
while ____ reproduction is less costly, _____ reproduction is commonly utilized because it generates genetic diversity
- asexual
- sexual
a life cycle is best described as the process that ____.
produces another generation of organisms
how many chromosomes does a human gamete possess?
23
bivalent formation and crossing over are two key events that typically occur at the beginning of which of these?
meiosis only
meiosis 1 sorting separates which of these
homologous chromosomes
the sister chromatids are separated during ____ 2 of meiosis
anaphase
what statement about mitosis and meiosis is correct?
sister chromatids are separated both during mitosis and meiosis
a zygote is created when two haploid cells, called _____ fuse
gametes
which of the following are main disadvantages of sexual reproduction?
- it involves lots of time and energy
- it requires specialized body parts
the sequence of events that produces another generation of organisms is known as a(n) ____ cycle
life
