Acertain organism has 24 pairs of homologous chromosomes (n = 24). how many chromosomes will each daughter cell have after telophase ii of meiosis? a. 24 b. 54 c. 48 d. 12

A (24 chromosomes)

Explanation:

Meiosis is a kind of cell division that produces four daughter cells in which each of the cells have a reduced number of chromosome (by half) as the parent cell.

According to the question, the organism has 24 pairs of homologous chromosomes i.e. each pair of chromosome is from each parent. In total, the organism (diploid, 2n) has 48 chromosomes.

Meiosis occurs in two stages; meiosis I and meiosis II. In meiosis I, homologous chromosomes are pulled apart to opposite end of the cell at the anaphase stage. Hence, out of 48 chromosomes, 24 chromosomes are pulled to one end while the other 24 to the other end of the cell. The reduction in chromosome number occurs in meiosis I.

Meiosis II is quite similar to mitosis. Sister chromatids (duplicated chromosomes) are pulled apart to each cell in the anaphase of meiosis II. Each chromatids act as individual chromosomes in the daughter cells after division.

In a nutshell, after meiosis II, four haploid (n) daughter cells will be produced with each cell having 24 chromatids/chromosomes.

question#1

ans:

cell is the basic unit of organization of all living things. cells are often called the building block of life and it is the smallest unit of life. the study of cell is called cell biology. cell consists of cytoplasm enclosed within membrane, which contain bio-molecules such as proteins and nucleic acid.

two third of cell is water, which means that two-third of your whole body is water. the rest is the mixture of molecules, mainly proteins, lipids and carbohydrates.

question#2

ans:

organ:

an organ is a group of tissues specialized to form a functional unit. an example is the heart in animals.

organ system:

an organ system is a group of several organs whose functions are synchronized to release an effective action in a living organism. an example is digestive system.

question#3

different systems perform different function at tissue level. for example, the respiratory system facilitates breathing. in the alveoli tissue of the lungs, the exchange of oxygen and carbon dioxide molecules between the air and the bloodstream occurs by passive transport, so that oxygen is taken in and carbon dioxide and water are removed. different systems of the body carry out different functions. for example, your digestive system is responsible for taking in and processing food, while your respiratory system working with your circulatory system is responsible for taking up oxygen and getting rid of carbon dioxide.

question#4

different systems perform different function at tissue level. for example, the respiratory system facilitates breathing. in the alveoli tissue of the lungs, the exchange of oxygen and carbon dioxide molecules between the air and the bloodstream occurs by passive transport, so that oxygen is taken in and carbon dioxide and water are removed. different systems of the body carry out different functions. for example, your digestive system is responsible for taking in and processing food, while your respiratory system—working with your circulatory system is responsible for taking up oxygen and getting rid of carbon dioxide.

question#5

our body works because of the interactions that happen between organs and organ systems.  

for example:  

the heart to regulate blood flow throughout the body. the blood carries oxygen and nutrients to the cells and carries carbon dioxide and waste away from the cells. body systems work together in maintaining a constant internal environment. when this balance is disrupted, the body systems may not function properly, and human health can suffer.   you start to feel bad.