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).
I think its A, because the sound has to travel through more objects, compared to the north pole, where it doesn’t travel through much.
Transposable elements and short tandem repeats are different because short tandem repeats make up only a small percentage of a given genome while transposable elements often make up larger parts of a genome. So the correct option is C.
<h3>
What are transposable elements? </h3>
Transposable elements or transposons are a class of genetic elements. They can “jump” from one location to another, in a genome.
Even though they are called “jumping genes,” they have an integrated site in a genome and are maintained there. Also, most of them are eventually inactivated and can not move any longer.
Whereas Short tandem repeats or STRs are short repeats of DNA. They are also known as microsatellites or simple sequence repeats. They have a repetitive unit of 1-6 bp and form a series of 100 nucleotide lengths.
Therefore the correct option C.
Read more about transposons, here
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Explanation:
While most snakes and lizards in North America are not poisonous, a few species can seriously injure or kill someone with their venom if the bite isn't treated quickly. They include the rattlesnake, copperhead, cottonmouth, coral snake, Gila monster, and Mexican bearded lizard.
From what we know, we can confirm that based on memory research, the best way for Vance to remember the new information is to get a good night's rest.
<h3>Why is it important to get a good night's rest?</h3>
Recent memory research has linked a good sleeping habit to widely increased memory performance. Sleeping helps the brain to strengthen the vividness of memory and the brain's ability to more easily recall that information.
Therefore, we can confirm that based on memory research, the best way for Vance to remember the new information is to get a good night's rest.
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