what is Sex Chromosomes and Sex Determination?

Q: What is the gene in the human chromosome that determines the "maleness"?

A: Gene is the sequence of nucleotides that encode a particular protein. The genes are present in the…

Q: What is the importance of Gametogenesis and Spermatogenesis in Meiosis?

A: Gametogenesis Formation of gametes. Gametes develop in the gonads(sex cells). In male, it is…

Q: In which period of meiosis does the pairing of homologous chromosomes occur?

A: Meiosis is a type of cell division to produce male and female gametes, sperm and ovum. It is…

Q: Why are newborns with an abnormal sex chromosome number more likely to survive than those with an…

A: Humans have a total number of 46 chromosomes that is 23 pairs of chromosomes in which 22 of them are…

Q: What are the major results of meiosis?

A: Meiosis is a type of cell division. There are two rounds of nuclear division that is meiosis I and…

Q: What are polar bodies?

A: In humans, the female gamete is said to be ova or egg. Females have a pair of ovaries. Ova are…

Q: What is the role of meiosis in a cell?

A: The cell is the basic structural and functional unit of the body. The chromosomal theory of…

Q: What are the three events during sexual reproduction that prevent identical children?

A: Sexual reproduction confers an advantage to the offspring; it generates genetic diversity which…

Q: What is the  kinetochore and What is the function of kinetochore?

A: Kinetochore is a disc-shaped protein that assembles on the centromere to link the chromosomes to…

Q: What are the periods of the second meiotic division?

A: Meiosis is the reduction division type of cell division in which the original number of chromosome…

Q: What are meiosis and its significance?

A: Cell division is the process in which a parent cell is divided into two or more daughter cells. Two…

Q: How do meiosis produce genetic variability?

A: Cell division is a process of a parent cell replicating it chromosomal content and dividing itself…

Q: Explain sex chromosomes?

A: Chromosomes are found in the nucleus of all the animal and plant cells. A single DNA molecule wraps…

Q: When does meiosis occur in girls? In boys?

A: Meiosis is where a solitary cell divisions twice to deliver four cells containing a large portion of…

Q: What are the respective functions of the separation of homologous chromosomes and of the separation…

A: Meiosis is a process in which one cell divided to form four cells. It is responsible for the…

Q: How do sex chromosomes differ from autosomes?

A: Chromosomes are primarily differentiated into two types based on the characters they control in an…

Q: How does meiosis introduce new genetic combinations?

A: Answer: Introduction: Meiosis is the process in which the parent cell divides twice into four…

Q: How does the first meiotic division result in reducing the number of chromosomes

A: Meiosis is the type of division in which the number of chromosomes in daughter cells is half of the…

Q: How do we know whether or not a heteromorphic chromosome such as the Y chromosome plays a crucial…

A: Sex determination is the foundation or establishment of sex through differential advancement in a…

Q: What happens during the interphase of meiosis?

A: Cell division is the process by which a parent cell divides into two or more daughter cells. Cell…

Q: Which chromosome determines the sex? Which gene determines the sex?

A: Sex determination system is a biological system which determines the development of sexual…

Q: How is the genetic determination of sex established in humans?

A: There are 46 chromosomes in the diploid human genome, 44 of which are autosomes and two of which are…

Q: What are the periods of the first meiotic division?

A: Meiosis could be divided as meiosis-I and meiosis-II. Meiosis-I is the reduction division and…

Q: what is meiosis?

A: The cell division is a process in which parent cell divides, finally giving rise to two or more…

Q: What are chromosomal disorders?

A: The chromosomes are thread-like structure situated inside the nucleus of plant and animal cells.…

Q: What are the purposes of meiosis?

A: Cells are the smallest functional and structural unit of all organisms. All cells have a cell…

Q: What are the stages of meiosis and what major events take place in each stage?

A: Cell cycle: - it is a series of changes occur in a newly divided cell through which it duplicates…

Q: What are the end products of meiosis?

A: The cell division is the fundamental process of life that ultimately responsible for the generation…

Q: How does meiosis maintain the number of chromosomes in a sexually reproducing species?

A:

Q: What are two distinct chromosomes that provide the basis of sex determination?

A: In a biological system, the development of sexual characteristics in an organism is determined by…

Q: What is the significance of meiosis?

A: The indirect process of cell division in which the chromosomes of parent cells divide once but…

Q: In which phase of meiosis would certain gene segments of the homologous pairs of chromosomes…

A: In eukaryotes, cell division is divided into two major categories, mitosis, and meiosis. While…

Q: How are mitosis and meiosis alike and different? Identify the steps of meiosis

A: The cells in our body divide and reproduce by two methods known as mitosis and meiosis. There are…

Q: In which phase of meiosis would certain gene segments of the homologous pairs of chromosomes “cross…

A: Meiosis includes two cycles of nuclear division and only one cycle of DNA replication. The result of…

Q: What is a gamete and other cells that carry only a single set of chromosomes?

A: Gametes are cells that are formed by meiosis. Four gametes are formed as a result of two fissions.…

Q: What are the specific events in Meiosis that contribute to genetic variation?

A: Meiosis is a reductional division. It produces four haploid daughter cells from diploid parent cell.…

Q: Where does meiosis occur?

A: Meiosis: It is a type of division in which a parent cell is divided into four genetically different…

Q: What are the processes of meiosis, gametogenesis, crossing over, and nondisjunction.

A: All these processes take place in gametes.

Q: Meiosis is found in which type of cells?

A: Meiosis is the process in which single cell of an individual parent divide twice time to form 4…

Q: Does Y chromosome play a role in sex determination ?

A: A biological system that controls the development of sexual traits in an organism is known as a…

Q: How might abnormal meiosis lead to alterations in chromosome number or structure?

A: A total of 46 chromosomes (or 23 pairs of chromosomes) are found in nearly every cell in our body.…

Q: What are the subdivisions of meiosis?

A: During meiosis one diploid parent cell produces four haploid daughter cells that are not identical…

Genetic Evolution

Sexual reproduction produces distinct population variations. Heredity determines the traits and qualities to be passed down to the progeny. Over time, this variation within-species is also affected by the process of human evolution. The study of how genetic variation leads to evolutionary changes is known as genetic evolution. If a trait helps an organism to survive and reproduce, it is more likely to be passed down the generations. It is rare that such traits result in a completely distinct set of traits in descendants than the ancestral population; this can result in the emergence of a new species.