Question

In a litter of kittens, some of the kittens have coloring that is completely different from their parents. What is the explanation for this?

A. Crossover during meiosis

B. The placement of the genes on the parent chromosomes

C. Chromosomal aberrations during meiosis

Answer 1

OK, the kittens have different phenotypes than their parents because they have different combinations of chromosomes than either parent. Which answer is most consistant with that?

Answer 2

b

Answer 3

I agree, but tentatively.

To some extent, crossing over contributes too - but of the options given, definitely B.

Well done!

Answer 4

thanks for breaking it down
will you help me with my other questions if i dont understand?

Answer 5

Sure.

But it really helps if, in addition to posting the question, you also explain where you're stuck or if you post an answer and why you think it's so as well.

Answer 6

Which of the following statements justifies that meiosis is reduction division?

A. Meiosis results in the formation of gametes.
B. Meiosis produces recombinant chromosomes.
C. Meiosis begins with a diploid cell, but produces four haploid cells.
i think its A because meiosis deals with gametes deal with cell division

Answer 7

Sorry that took so long. I think that you are right again.

Answer 8

its okay, i really dont understand this question or what it means or is
During spermatogenesis, which of the following undergoes meiosis II to produce four haploid mature sperm cells?
A: Haploid primary spermatocyte
B. Diploid secondary spermatocyte
C. Secondary spermatocytes

Answer 9

Spermatogenesis means sperm formation.

In meiosis, a diploid 2n cell becoming a sperm goes through a round of DNA synthesis so it is 4n. This is a primary spermatocyte. Then it goes through a round of cell division (also called meiosis I) into two secondary spermatocytes, both of which get half the DNA and are diploid. Then in meiosis II, each secondary spermatocyte divides again to produce a haploid sperm.

This is a badly worded question because, while option A is plainly out (primary spermatocytes are 4n, not haploid), either B or C are equally true. If you have to pick one, I'd pick the most specific, B.

But once again, a badly worded question.

Answer 10

thanks again for breaking it down for me, i dont really have good teachers lol

A cell under a microscope shows Two daughter cells were formed and they are diploid. Which stage of meiosis is the cell showing?
A. Meiosis I
B. Meiosis II
C. Interphase

Answer 11

As explained above, a cell which has yet to commit to meiosis is diploid. That is, it has 2n chromosomes. When it commits to meiosis, it doubles its DNA, becoming 4n. Then it goes through two rounds of cell division: during meiosis I, it divides into two cells and each of these cells is 2n. Then, during meiosis II, each of the two daughter cells divide again, producing a total of 4 haploid (that is, 1n) gametes.

Which stage in this process is associated with two diploid daughter cells?

Answer 12

meiosis I

Answer 13

Yes, you're right. :D

Answer 14

A cell under a microscope shows homologous chromosomes separated into two daughter cells, each of which is a haploid cell. Which stage of meiosis is the cell showing?
A. Meiosis I
B. Meiosis II
C. Interphase

Answer 15

Given what I told you above, which stage in the process is associated with producing haploid cells?

Answer 16

is it b

Answer 17

Yes, indeed it is.

Answer 18

A farmer sows pieces of potato with buds in the soil to grow more potatoes. Which kind of asexual reproduction is this?
A. Spore formation
B. Vegetative propagation
C. Budding
i think its b since its dealinh with vegitables

Answer 19

I agree. See, you're good at these. :D

Answer 20

yea since you explained it to me to where i understand it

Answer 21

How many questions do you have?

Answer 22

In which case might the offspring’s trait be mistaken for a blend of traits of parents?
:A. Incomplete dominance
B. Co-dominance
C. Polygenic inheritance

Answer 23

and i have 2 more lessons

Answer 24

Incomplete dominance happens when the heterozygous individuals (those with two different alleles) have a phenotype which blends the appearance of the dominant allele with the appearance of the recessive allele. In that case, the individual resembles neither of its parents but is a mixing of the two.

The difference between that and co-dominance is subtle: co-dominance occurs when an individual has both the phenotypes of the parents, as in the AB blood group.

Which of the two is more consistent with a "blend between two parents?"

Answer 25

incomplete dominance

Answer 26

Yes, exactly.

Answer 27

Which statement explains the difference between multiple alleles and polygenic inheritance
A. Multiple allele means more than one gene contributes to the phenotype and polygenic inheritance means more than two forms of the same gene in the population.
B. Multiple allele means more than two forms of the same gene in the population and polygenic inheritance means more than one gene contributes to the phenotype of a trait.
C. Multiple allele means more than two forms of different genes in the population and polygenic inheritance means one gene contributes to many phenotypic characters.

Answer 28

Each gene can have one or more variants (or alleles) where as polygenic refers to traits which are affected by more than one gene...

Answer 29

A?

Answer 30

Actually, I like B.

Answer 31

Hi blues,

Had a quick question about the reduction division and meiosis one posted up there - I thought that the term reduction division emphasized the reducing of chromosome number - so while A is definitely true, it seems C is more specific in pointing out the diploid to haploid transition? What are your thoughts?