Question

(03.01 MC)

During cell division, centromeres have separated, and chromatids are pulled apart, becoming chromosomes. What happens after the chromosomes are pulled to opposite ends of the cell? (2 points)


Prophase
Anaphase
Metaphase
Telophase
2. (03.01 HC)
Which of the following correctly predicts what would happen to a body cell if its processes were interrupted during mitosis? (2 points)


Cells would begin dividing uncontrollably.
Chromosomes would not separate into two nuclei.
Cytokinesis would occur more rapidly.
The cell would not be able to grow any further.
3. (03.02 MC)
During meiosis, sister chromatids are separated and move toward opposite ends of the cell as the centromeres that hold them separate. Which of the following processes will begin next? (2 points)


Prophase I
Metaphase II
Anaphase I
Telophase II
4. (03.02 MC)
A fox's diploid number of chromosomes is 36. How would the number of chromosomes in the fox's body cells compare to the number of chromosomes in its gametes? (2 points)


Its body cells and gametes would both have 18 chromosomes.
Its body cells and gametes would both have 36 chromosomes.
Its body cells would have 18 chromosomes, and its gametes would have 36 chromosomes.
Its body cells would have 36 chromosomes, and its gametes would have 18 chromosomes.
5. (03.02 HC)
Some organisms undergo asexual reproduction through mitosis, while others reproduce sexually, and their cells undergo meiosis to produce gametes. If there were drastic changes in temperature in an ecosystem, which process do you predict would be most beneficial to a species? (2 points)


Mitosis: it causes genetic mutations, which may be favorable to the species.
Meiosis: it increases genetic variation, which helps ensure the species will survive.
Meiosis: it produces more daughter cells, which increases the population of the species.
Mitosis: it produces identical offspring, which increases genetic variation.
6. (03.03 MC)
In pea plants, the allele for yellow seeds is dominant to the allele for green seeds. If a plant that has heterozygous yellow seed is crossed with one that has only homozygous green seeds, what percent of their first generation offspring would you expect to have green seeds? (2 points)


50 percent
100 percent
0 percent
25 percent
7. (03.03 HC)
In fruit flies, the allele for white eyes is recessive to the allele for red eyes. In a generation of fruit flies, 45 males with white eyes, 46 females with white eyes, 44 males with red eyes, and 47 females with red eyes are produced. Which of the following is the best conclusion you can make about the parents of this generation? (2 points)


One parent was heterozygous for eye color and the other was homozygous with red eyes.
Both parents were homozygous with red eyes.
One parent had white eyes and the other was heterozygous for eye color.
Both parents were heterozygous for eye color.
8. (03.03 MC)
Codominance is a form of inheritance in which two different alleles for a gene are both expressed, and neither allele is dominant over the other. One example of codominance is blood type in humans; the alleles for type A blood and type B blood are codominant. If a man who is homozygous for type A blood and a woman who is homozygous for type B blood have children, what would you expect to find in the children? (2 points)


Half will have type A and half will have type B blood.
The children will all have type B blood.
The children will all have type AB blood.
The children will all have type A blood.
9. (03.04 MC)
The pedigree chart below shows the individuals in a family who exhibit a certain trait. Based on the information in the chart, what are the chances that a second child born to couple 4-5 in the third generation will show the trait? (2 points)

A diagram of a pedigree chart. At the top of the chart are two individuals: one indicated by a green circle and one by a green square. At the next level down, the green circle is paired with a black square and the green square is paired with a black circle. From the green circle/black square pairing, there are three offspring: a green circle, a green square, and a black square. From the green square/black circle pairing, there are eight offspring: three black circles and four black squares. Two of the black squares are identical twins. One of the black circles is paired with another black square. This pairing produced one green circle.


25 percent
50 percent
100 percent
0 percent

Answer 1

2. (03.01 HC)
Which of the following correctly predicts what would happen to a body cell if its processes were interrupted during mitosis?
The correct answer is:
B. Chromosomes would not separate into two nuclei.

3. (03.02 MC)
During meiosis, sister chromatids are separated and move toward opposite ends of the cell as the centromeres that hold them separate. Which of the following processes will begin next?
Correct Answer: Metaphase. It is the second stage of cell division, between prophase and anaphase, during which the chromosomes become attached to the spindle fibres.

4. (03.02 MC)
A fox's diploid number of chromosomes is 36. How would the number of chromosomes in the fox's body cells compare to the number of chromosomes in its gametes?
Correct Answer: D) Its body cells would have 36 chromosomes, and its gametes would have 18 chromosomes.

5. (03.02 HC)
Some organisms undergo asexual reproduction through mitosis, while others reproduce sexually, and their cells undergo meiosis to produce gametes. If there were drastic changes in temperature in an ecosystem, which process do you predict would be most beneficial to a species?
Correct Answer:Meiosis: it increases genetic variation, which helps ensure the species will survive.
Meiosis is a specialized type of cell division that reduces the chromosome number by half, creating four haploid cells, each genetically distinct from the parent cell that gave rise to them.

6. (03.03 MC)
In pea plants, the allele for yellow seeds is dominant to the allele for green seeds. If a plant that has heterozygous yellow seed is crossed with one that has only homozygous green seeds, what percent of their first generation offspring would you expect to have green seeds?
Correct Answer: 50 percent.
Concerning the phenotype, the ratio would be 3:1 for yellow. Again, assuming yellow is dominant and green is recessive, then both YY and Yy would be yellow and yy would be green.

7. (03.03 HC)
In fruit flies, the allele for white eyes is recessive to the allele for red eyes. In a generation of fruit flies, 45 males with white eyes, 46 females with white eyes, 44 males with red eyes, and 47 females with red eyes are produced. Which of the following is the best conclusion you can make about the parents of this generation?
Answer: One parent had white eyes and the other was heterozygous for eye-color.
The organism is homozygous if both alleles are the same - that is, either both are dominant or both are recessive. The organism is heterozygous if the alleles are different - that is, if one allele is dominant and the other allele is recessive.

8. (03.03 MC)
Codominance is a form of inheritance in which two different alleles for a gene are both expressed, and neither allele is dominant over the other. One example of codominance is blood type in humans; the alleles for type A blood and type B blood are codominant. If a man who is homozygous for type A blood and a woman who is homozygous for type B blood have children, what would you expect to find in the children?Answer: As both the parents are homozygous, the gametes produced by male parent carry genes for A blood group and gametes produced by female will carry genes for B blood group. So, zygote will have both Genes for A & B. Since they are codominant.
So,The children will all have type AB blood.

9. (03.04 MC)
The pedigree chart below shows the individuals in a family who exhibit a certain trait. Based on the information in the chart, what are the chances that a second child born to couple 4-5 in the third generation will show the trait?
Correct Answer: 25 Percent.
The infection legacy design depicted above shows Sex linked recessive legacy design and in a cross between two heterozygous people, there is a quarter or 25% possibility for the second child destined to be influenced.

Answer 2

1. The answer is Telophase.
This is the last step of mitosis, during which the sister chromatids reach opposite poles. The small nuclear vesicles in the cell begin t reform around the group of chromosomes at each poles. Mitosis is a very important part of cell division because it is the process by which the parent cell gives its DNA to its two daughter cells.

2. The correct answer is 4. The cell would not be able to grow any further
Body cells divide by the process of mitosis; a process in which a body cells undergoes division tow yield two diploid daughter cells, the process enhances growth and development as the cell increase in number by multiplying themselves.

3. The correct answer Telophase II;
In prophase II, the nuclear envelop breaks down the spindle apparatus forms. The nuclear envelope forms around each set of chromosomes and cytokinesis occurs, producing four daughter cells, each with haploid set of chromosomes.


4. The answer is 4. its body cells would have 36 chromosomes and its gametes would have 18 chromosomes. The somatic cells or the body cells are cells that have diploid (two pairs of chromosome) number, while the gametes are formed from the process of meiosis and contains haploid number of chromosomes.

5. The best answer is ; meiosis ; it increases genetic variation, which helps ensure the species will survive. Meiosis is a type of cell division in which a cell (germ-line cells), where a cell divides to yield four daughter cells which are haploid; Meaning they have half the number of chromosomes as the parent cell.

6. The answer is 50 percent. If the dominant allele is Y and the recessive allele; Therefore; the heterozygous will be Yy and the homozygous green color will be yy.
Thus; A cross between heterozygous Yy and the green recessive yy will yield; 50 percent heterozygous and also half homozygous recessive.

7. The correct answer is that One parent was heterozygous for eye color and the other was homozygous with red eyes.
An organism can be homozygous dominant, if it carries two copies of the same dominant allele, or homozygous recessive, if it carries two copies of the same recessive allele. Heterozygous on the other hand, means that the organisms has two different alleles of a gene.

8. The correct answer is that the children will all have type AB blood. Both A and B alleles are dominant over O. as a result, individuals who have an AO genotype will have an A phenotype. The A and B alleles are codominant. When two alleles for a trait are equally expressed with neither being recessive or dominant, it creates codominance.

9. I believe the disease inheritance pattern described above by the cart shows Sex linked recessive inheritance pattern and in a cross between two heterozygous individuals there is a 50 percent chance for the second child born to be affected.

10. The answer for the question is 50 % percent.
I think that the infection design that is described above is a sex linked recessive legacy design and in a cross between two heterozygous individuals, there will be a half or 50 percent probability or possibility for the second child to be influenced.