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Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
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Anonymous Carolina Castillo2
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4 months ago
1) Use the table below to determine the haploid number for each organism.

Common Name                           Ploidy                      Number of Chromosomes
          Dog                                     Diploid                                    78

     Potato                                 Tetraploid                                  48

      Shark                                    Diploid                                       82

     Wheat                                 Hexaploid                                    42

Fill in the haploid number for each organism below.

  Answer                 Answer                                Answer                          Answer

   Dog                       Potato                                   Shark                              Wheat





2) SEE FIRST PHOTO ATTACHED

3) Global warming is an issue affecting many species around the world. Warming has caused the temperatures in lakes and rivers to increase and stay elevated for longer periods of time.

Select the numbers that describe the possible effects of global warming on the reproduction of rainbow trout in the wild and on biodiversity.

1) The extra set of chromosomes remains.
2) The extra set of chromosomes is removed.
3) The offspring are diploid (2n).
4) The offspring are triploid (3n).
5) The offspring cannot reproduce.
6) The offspring can reproduce.
7) Biodiversity decreases.
8) Biodiversity increases.

Please record the numbers in ascending order.

Answer         Answer           Answer        Answer





4) Select the statements below that describe the process of mitosis.
 
1) used for growth, repair, and development
2) used to produce gametes for sexual reproduction
3) involves one cell division
4) involves two cell divisions
5) each daughter cell produced is genetically unique
6) each daughter cell produced is genetically identical to the parent
7) DNA is replicated during interphase
8) DNA is replicated during prophase

Record the numbers in ascending order.

Answer             Answer              Answer           Answer


5) Some Events that Occur in Various Stages of Cell Division

1) DNA replication takes place.
2) Cytoplasm divides.
3) Chromosomes align at the equator of the cell.
4) Centromeres split; sister chromatids pull apart.
5) Chromosomes condense.
6) Chromatids move to opposite poles.

The sequence in which the events numbered above occur in cell division is Answer
, Answer , Answer , Answer , Answer , and Answer.ANSWER





6) Identify the main phases of interphase in the correct order.

a. Growth and synthesis

b. Growth 1, synthesis, growth 2

c. Growth, synthesis, and mitosis

d. Growth, mitosis and cytokinesis



7) Which of the following statements correctly describes the process of mitosis?

a. A complete set of homologous chromosomes are divided into two germ cells.

b. A complete set of homologous chromosomes are equally divided into each reproductive cell.

c. DNA and cytoplasmic contents are equally divided into each daughter cell.

d. Cytoplasm and its organelles are equally divided into each daughter cell.



8) After mitosis occurs in a cell cycle, the cytoplasm, mitochondria, lysosomes, and other organelles are divided into two daughter cells. This process is called

a. I and PMAT

b. interphase

c. binary Fission

d. cytokinesis



9) Which of the following rows lists the cell cycle in the correct sequence?

a. Interphase, G1, S, G2, mitosis, cytokinesis

b. Interphase, prophase, metaphase, anaphase, telophase, cytokinesis

c. Interphase, metaphase, prophase, telophase, anaphase, cytokinesis

d. Prophase, metaphase, anaphase, telophase




10) Identify the phase in mitosis in which the centromere splits and the sister chromatids are pulled to the opposite poles.

a. Telophase

b. Metaphase

c. Prophase

d. Anaphase



11) Identify the phase in mitosis in which the chromatin condenses into chromosomes.

a. Telophase

b. Prophase

c. Anaphase

d. Metaphase




12) Identify the phase in mitosis in which the DNA uncoils and the nuclear membrane is formed again.

a. Anaphase

b. Metaphase

c. Telophase

d. Prophase
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Answer verified by a subject expert
Anonymousbio_man
wrote...
#1
4 months ago
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#1

Dog - 39

Potato - 12

Shark - 41

Wheat - 7

#2

Rainbow trout go through a unique genetic reproductive process. Female eggs are diploid, while male sperm are haploid. In the wild, when the sperm fertilizes an egg, the extra set of chromosomes is kicked out, resulting in a diploid offspring.

Triploid trout are produced in the lab to provide sterile fish stock for lakes. Shortly after the eggs are fertilized,scientists place them in a warm water bath to prevent the extra chromosomes from being removed. The result is a triploid fish that cannot reproduce.

Rainbow trout: n=30


For rainbow trouts female eggs are diploid and male sperms are haploid. Since n=30 for rainbow trouts, so egg will be 2n=60 and sperm will be n=30. In the wild when sperm is fused to eggs an extra set of chromosome is kicked out. So, in the wild the offsprings produced will be 2n=60. Triploid trouts are produced in the labs by kepping them in warm bath thus raising the temperature that prevents the kicking out the extra set of chromosomes. So, offsprings produced in labs will be 3n=90. The alternative which contains all the correct option is option-d.



#3

Since global warming increased the temperature of lakes and ponds so extra set of chromosomes will not be removed after fertilization of egg by sperm in rainbow trout. As a result triploid offsprings (3n) will be produced. Triploid trouts will be non-fertile i.e. sterile. Thus the population of rainbow trout will decrease as the triploid fisher are unable to reproduce which in turn will decrease the biodiversity. The numbers that describe the possible effects of global warming on the reproduction if rainbow trout and on biodiversity are-

1.The extra set of chromosomes remain

4. The offspring are triploid (3n)

5. The offspring cannot reproduce

7. Biodiversity decreases

i.e. 1,4,5,7.

#4

Mitosis cell division is a type of cell division where one parent cell divides for a single time to give rise to two daughter cells identical to parental cell. It helps in growth, repair and developmental processes. DNA is replicated in Synthesis phase or S-phase of mitosis which is a part on interphase. Whereas meiosis is a specialized cell division, occurs during gamete formation where a parental cell divides twice to give rise to four cells which are unique.

So the statements that describes the process of mitosis are-

1. used for growth, repair, and development

3. involves one cell division

6. each daughter cell produced is genetically identical to the parent

7. DNA is replicated during interphase

i.e. 1,3,6,7.

#5

The events in cell division takes place in the following order-

1. DNA replication takes place: It is initial phase of cell division takes place in S-phase of interphase of the preparatory phase.

5. Chromosomes condense: Chromosome condensation takes place in first phase of the division phase know as prophase.

3.Chromosomes align at the equator of the cell: In the second stage of the division chromosomes are arranged in the equator of the cell and it is known as metaphase.

4. Centromeres split; sister chromatids pull apart: In the third stage of the division phase known as anaphase the sister chromatids are pulled apart by spindle fibres after splitting of centromere.

6. Chromatids move to opposite poles: In the last stage of the division phase the telophase the chromatids move to two opposite poles.

2.Cytoplasm divides: After all these nucelar divisions the cytoplasm divides to give rise to new cells and it is known as cytokinesis.

So the sequence in which the events numbered above occur in the cell division is 1,5,3,4,6,and 2.

#6

growth 1, synethsis, growth 2.

#7

DNA and cytoplasmic contents are equally divided into each daughter cell.

#8

cytokinesis

#9

a. Interphase, G1, S, G2, mitosis, cytokinesis

#10

Anaphase

#11

Prophase

#12

Telophase

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Anonymous Author
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#2
3 months ago
thanks
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