The sperm cells of a domesticated cat, Felis
domesticus, has 19 chromosomes. How many chromosomes are...
The sperm cells of a domesticated cat, Felis
domesticus, has 19 chromosomes. How many chromosomes are in
the cat's somatic cells?
Solutions
Expert Solution
Ans.
Any animal undergoing cell reproduction, their cells will
divide in either of two ways;
Mitosis of somatic cells or body cells, and
Meiosis of gametes or sex cells
Each of these processes create different number of daughter
cells having different chromosomal counts.
Mitosis helps in repairing a wound, growth of an organism and
asexual reproduction in some organisms.
End result of mitosis is 2 daughter cells identical to the
original cell and having same number of chromosomes.
Meiosis is comprise of 4 stages ; prophase, metaphase, anaphase
and telophase.
After the completion of meiosis, 2 daughter cells will be
produced having same number of chromosomes as the parent cell.
Cats have definite chromosome numbers including a pair of sex
chromosome designated as X and Y.
Domesticated cats have 38 chromosomes in the somatic
cells which are divided equally (19) into sperm cells and
eggs in the meiosis to produce a daughter cell.
Thus, upon fertilization of a sperm, two half-pairs of the
chromosomes are merged resulting in 38 chromosomes in daughter
cells.
A cat germ cell has a haploid number of 19 chromosomes.
1) Number of cells in prophase 1 and telophase 1 of meiosis
2) Number of chromatids in prophase 1 and telophase 1 of meiosis
3) Number of chromosomes in prophase 1 and telophase 1 of meiosis
16. Knowing that the somatic cells of the mouse have 40
chromosomes. How many chromosomes will there be in:
a) A haploid cell:
b) A diploid cell:
c) A neuron in phase G2:
d) An oocyte:
e) A fibroblast in phase G1:
f) A tetraploid macrophage in G2:
how
many chromosomes are in a cell during prophase I of meiosis?
how many chromosomes are in a cell during prophase of
mitosis?
are the chromosomes considered uncondensed at the end of
telophase?
where do tetrads come from? are they from your mom and dad? if
so, how does that work since we’re preparing gametes to be
fertilized which have not yet received the partners 23
chromosomes?
A cell in G1 has 4 chromosomes (2n = 4).
How many chromosomes per cell at the end of the following
stages?
How many DNA molecules per cell at the end of the following
stages?
1.S phase
2.G2 phase
3.Metaphase
4.Anaphase
5.Cytokinesis
Please explain, thanks.
If a diploid cell has 4 chromosomes at interphase (before S
phase), how many chromosomes AND sister chromatids will it have at
each of the following phases?
Prophase 1
Metaphase 1
Anaphase 1
Telephase 1
Prophase 2
Metaphase 2
Anaphase 2
Telephase 2
Where in the eukaryotic cell are the chromosomes found?
_________________________________________________
How many chromosomes are there in a human body (somatic) cell?
____________________
How many chromosomes are there in a human gamete?
__________________
If in some species the number of chromosomes in a diploid body
cell is 12 then the number of chromosomes in a haploid cell is
____________________.
The process of mitosis produces how many offspring (or
daughter) cells? ____________ These cells are clones of each
other.TRUEFALSE
The process of...
If a diploid cell is 2N=8, draw the chromosomes of the
following. How many chromosomes and chromatids would you see on the
cells in the following stages.
a) Nullisomic for chromosome 2 in G1
b) Monosomic for chromosome 1 in G1
c) Tetrasomic for chromosome 4 in mitotic metaphase
d) Trisomic for chromosome 2 in G2
e) Triploid in metaphase 1 of meiosis
When do the chromosomal strands become double in (1) a somatic cell and (2) a pollen mother cell (microsporocyte)? Cite and discess the evidence for the answer.
A cell starts will 46 chromosomes. How many chromosomes would
you expect to find in each daughter cell following successful
mitosis and cytokinesis? Select one: a. 23 b. 92 c. 46 d. 24 in one
daughter cell and 22 in the other daughter cell.