Why do females have Barr bodies?

Q: During what stage of meiosis do t

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Are gametes always madeby meiosis?

A: Cell division is a biological process in which cell divides into two or more daughter cells. It is…

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: 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 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 Sex Chromosomes and Sex Determination?

A: The chromosomes are the microscopic threadlike structure of the cell that carries the hereditary…

Q: Where does meiosis occur in males? Why are each of these stages important in sexual reproduction?…

A: Meiosis is a type of cell division that results in the formation of four daughter cells that have…

Q: Concerning the sexchromosomes of the XYsystem which type of gametedo the male and the…

A: Chromosomes are thread-like structures located inside the nucleus of animal and plant cells. Each…

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: Why are Barr bodies not found in males?

A: In 1949, Barr and Bertram first observed a condensed body was called sex chromatin by them and was…

Q: What is importance of barr body

A: Chromosomes are defined as the thread-like structures that carry genetic information. There are 23…

Q: How is polyspermy prevented?

A: Polyspermy is the process by which multiple sperms fertilize a single egg. This happens in only 1%…

Q: What do you mean by endometrium?

A: The reproductive system is involved in sexual reproduction. The male and female reproductive systems…

Q: Why does only one sperm fertilize the egg, and why is this important?

A: Fertilization is the process in which gametes (an egg and sperm) fuse to form a zygote. The egg and…

Q: Why is it necessary for gametogenesis to reduce the chromosome number of the sex cells by one-half?

A: Ans: Gametogenesis: It is the biological process in which haploid or diploid cells divide as well as…

Q: What is bipotential gonads ?

A: Answer- Gonads are sexual organs that form gametes and are crutial in sexual reproduction process.

Q: How often do mistakes occur in meiosis?

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

Q: Only one gene is present in gamete and not both . explain it?

A: Gametes  Gametes are the male and female reproductive cell produce by male and female reproductive…

Q: Offspring formed due to sexual reproduction have better chances ofsurvival. Why? Is this statement…

A: Sexual reproduction requires at least two individuals of different sexes. One of them is male and…

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 sex determined in humans? Which sex determines the sex of the offspring?

A: Sex determination is the determination of sex by examining the sex chromosomes in the individual.…

Q: What process creates gametes?

A: Gametes production.

Q: What gene normally present on the Y chromosome is responsible for a male phenotypic sex?

A: Sex determination in humans is based on the type of chromosomes present in an individual. Humans…

Q: Starting with oogonia, describe the formation ofsecondary oocytes by meiosis. What are polar bodies?

A: When the females are born, they have complete supply of the gametes for lifetime. At birth, there is…

Q: What will happen when during meiosis, chromosomal crossover will not occur?

A: At pachytene (prophase-I) stage of meiosis, non-sister chromatids of homologous chromosomes exchange…

Q: what Is trisomy 18?

A: The chromosomes are the thread like structure that contains hereditary information in the form of…

Q: .What type of abnormality in the sperm that fertilizes a normal egg will produce an XYY zygote? What…

A: XYY syndrome or Jacob's syndrome  . This condition 47 ( or 46Y) is seen in male .  It is not…

Q: Why the polar bodies cannot be fertilized by sperms?

A: A polar body is a tiny haploid cell that forms during oogenesis at about the same moment as an egg…

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 trisomy 13 ?

A: A chromosomal disorder is a missing, extra, or irregular portion of chromosomal DNA. It can be form…

Q: If nondisjunction of the sex chromosomes takes place in meiosis I in the male, what sexual…

A: Meiosis is a type of cell division in which a diploid cell undergoes reductional division to form…

Q: Why is it necessary for the egg to have changes leading to polyspermy block during fertilization?

A: Polyspermy is a lethal condition in which one egg is feritilized by more than one sperm

Q: When are primary oocytes and spermatocytes produced, and how manygametes result from one diploid…

A: Spermatogenesis as the name suggests is the production of male gametes by the process of meiosis,…

Q: How common is sperm DNA fragmentation?

A: Sperms are the haploid male reproductive cells, which fuses with the haploid ovum or egg to form…

Q: Which of the phases of XCI occurs in anadult female?

A: X chromosome inactivation is a gene silencing program on one of the X chromosomes in females. This…

Q: How would you explain post covid syndrome to someone who doesn't know it?

A: Covid 19, or coronavirus disease which was discovered in 2019 in the Wuhan district in china. From…

Q: What is sperm aneuploidy?

A: Aneuploidy is defined as the abnormal chromosome number in contrast to the usual chromosome number…

Q: What is the difference between primary and secondary sex determination?

A: Sex determination is the act of determining the sex/gender of a person, and this is done by…

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

A: All these processes take place in gametes.

Q: Why is it risky for a haploid sperm cell to go through diffrencition after meiosis?

A: In males, new germ cells continuously enter meiosis from the time of sexual maturation, and each…

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: What are the Consequences of Inversions during Gamete Formation ?

A: A chromosomal inversion occurs when a portion of a chromosome is flipped end-to-end. When a single…

Q: what is the process that produces sex cells

A: Gametes are the sex cells which participate in sexual reproduction.

Q: What are Alfred's possible sperm with regard to these two traits?

A: Answer :  Alfred's possible sperm in view of heterozygous of polydactyl

Q: What is Trisomy 20?

A: The chromosome 20 likely has more than 500 genes which provide the instruction for the making of…

Q: If a male has genotype Aa Bb Cc Dd, what proportion of his sperm cells are expected to have genotype…

A: We have, genotype of the person - Aa Bb Cc Dd During gamete formation, the allelic genes segregate…

Mitochondrial Mutations

A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.