Biology Questions and Answers
- What are the respective
ploidies of gamete, zygote and
somatic cells in a species with
gametic meiosis?
Adopting as patterchromosomes for gametes, zyn an “x” quantity ofgotes will (^)
have 2x will have 2x tochromosomo. es and somatic cells
- Why is meiosis important
for the maintenance of the
normal quantity of
chromosomes of a species
with sexual reproduction?
A reduction to a half of the maximum
normal qmandatory in uantitysome phase of the life of chromosomes is (^)
cycle of a species that reproduces
sexually. If that couleach generation, whenever a zyd not happen ingote is (^)
formed by fusion of gametes there
would be duplication in chromosomes in a geometricthe quantity of
progression.
- What is the difference
between sexual spores and
gametes? Do humans present
sexual spores or gametes?
Sexual sporfrom meiosis with ploidy es are structures ge(number ofnerated
chromosomes) rcompared to the spore mother cell.eduction to a half (^)
Spores germinate and give existence to
gametophytes, inmitosis form gametes. The meiosis thatdividuals that by (^)
generates sexual spores is called sporic
meiosis; it is, for example, the type of
meiosis that occurs in plants.
Gametes are also cells with half the
number of chromosomes ocell of the species, but they aref the normal
specialized in fecundation, the fusion
with another gamzygote, a cell with dete that generates theouble the number of (^)
chromosomes than gametic cells.
Gametes can meiosis or by mitosisappear from gametic in gametophytes (^)
originated from sexual spores.
In humans as well in most animals the
meiosis is gametic.nor alternation of generations. T There are no sporeshe male (^)
gamete is the sperm cell, and the
female gamete is the egg cell.
- Is the interphase of
meiosis different from the
interphase of mitosis?
The interphase that precedes meiosis is
similarmitosis. to the inter In them the main ephase that precedesvent is DNA (^)
replication (chromosome duplication).
- What are the two divisions
of meiosis? What are the main
events that occur in those
divisions?
Meiosis is divided into firstdivision, or meiosis I, and second meiotic
meiotic division, or meiosis I the separation omeiosisf homologous II. During (^)
chromosomes occurs, with formation of
two haploid cells. Inseparation of identical meiosis II there is chromatids of
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