If a pair of homologous chromosomes fails to separate during anaphase of meiosis I, what will be the chromosome number of the four resulting gametes with respect to the normal haploid number (n)?
a) n + 1; n + 1; n - 1; n - 1
b) n + 1; n + 1; n; n
c) n + 1; n - 1; n; n
d) n + 1; n - 1; n - 1; n - 1
Answer:
a) n + 1; n + 1; n - 1; n - 1
Explanation:
Separation of homologous chromosomes occurs during anaphase-I of meiosis. This event reduces the chromosome number from 2n to "n" in the daughter cells. If a pair of homologous chromosomes do not separate during anaphase-I, both the homologous chromosomes of that pair would be present in one daughter cell of the meiosis-I (n+1) while the other daughter cell would lack that chromosome (n-1).
Meiosis-II would maintain this chromosome number. Therefore, two gametes will have one extra chromosome (n+1) while the two gametes would lack one chromosome (n-1).
Answer:
true
Explanation:
it will become more stable, because different species will convert the wastes of one to another useful product, thereby stabilizing the environment.
Answer:
During the day, the Sun shines through the atmosphere. Earth's surface warms up in the sunlight. At night, Earth's surface cools, releasing heat back into the air. But some of the heat is trapped by the greenhouse gases in the atmosphere. That's what keeps our Earth a warm and cozy 58 degrees Fahrenheit (14 degrees Celsius), on average.
Explanation:
It makes proteins in your body and that's pretty important. hope this helped
