What is a simple and convenient method for tracking the kinds of gametes produced as well as all the possible combinations that might occur at fertilization?

Q: What is polyspermy? What are the processes involved to prevent polyspermy occurring?  Explain in…

A: Introduction :- Polyspermy is a term used in biology to describe the fertilisation of an egg by more…

Q: What is the significance of fertilization and how does it restore diploidy?

A: Fertilization is the process of fusion of haploid male gamete or sperm with a haploid female gamete…

Q: that a gamete underwent meiotic non-disjunction. Explain two possible outcomes for the zygote that…

A: In normal anaphase that occurs during the cell division, sister chromatids are pulled by…

Q: Describe how nondisjunction in human female gametes can give rise to Klinefelter and Turner syndrome…

A: Gametes are formed by the process of meiosis.

Q: What is the advantage of external fertilization over internal fertilization

A: Advantages of external fertilization over internal fertilization -  1. The number of offspring…

Q: is in vitro fertilization a humen disease?

A: In vitro Fertilization (IVF) is a type of Assisted reproductive technology (ART). This implies…

Q: Why does theheterozygote have an advantage?

A: When an individual contains a dissimilar pair of alleles for the same gene, the condition is…

Q: What are chromosomal basis of sex determination?

A: Chromosomes are the thread-like structures that appear in the cells only during the cell division.…

Q: A diploid organism is heterozygous for 4loci,how many types of gamete can be produced?

A: 'Locus' is a term which is used to denote the fixed position of a gene on the chromosome. A gene…

Q: What is the definition of meiosis? What are the phases of meiosis? What are the general features of…

A: Meiosis is the cell division where a parent cell divides to give rise to two daughter cells that…

Q: What structural and biochemical changes do the spermatid undergo during spermiogenesis? How do these…

A: introduction:-Spermatogenesis is the formation of sperm cells. To produce spermatozoa, rounded…

Q: Describe the XX-XO system of sex determination. In this system, which is the heterogametic sex and…

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

Q: What is self-fertilization?

A: Reproduction is a property shown by living organism in which one organism (parent) gives rise to new…

Q: How is the date in the Pregnancy Ultrasound dated. Is it Day/Month/year or Month/day/ Year?

A: The best time to estimate gestational age using ultrasound is between the 8th and 18th weeks of…

Q: Name all the phases of meiosis in the proper order?

A: Meiosis  It is a kind of cell division where four haploid cells are formed from single diploid cell.

Q: Why does external fertilization not require the involvement of gametes?

A: The fertilization is the characteristics of sexual reproduction that involves fusion of male and…

Q: It has been suggested that looking for the presence of the SRY gene would be a better way of…

A: SRY Gene - The SRY gene is found on the Y chromosome. The sex-determining region Y protein produced…

Q: In the X-Y and Z-W systems of sex determination, which sex is theheterogametic sex, the male or…

A: Ans: Sex determination: It is the biological systems which determines the sexual characteristics in…

Q: In humans, what are the random and non-random events in sexual reproduction (post-meiosis) that…

A: Reproduction is the process in which new offspring are produced from the parent. Sexual reproduction…

Q: How does Cu- T act as a contraceptive?

A: Birth control is also called as contraception and fertility control. It is a method or device used…

Q: What is fertilisation? Give examples

A: Human beings are sexually reproducing organisms. The male reproductive system consists of pair of…

Q: Draw a Punnett square.  cross an XX woman with an XY man. How many kinds of eggs can a woman…

A: Chromosomes are long thread-like structures that carry coded genetic information in the form of DNA.…

Q: Why do you think the zygote is dormant for sometime in a fertilised ovule?

A: In angiosperm, pollination is the process in which pollens are transferred from the stamen to the…

Q: "What is the advantage of internal fertilization over external fertilization and vice versa"?

A: The natural cycle by which new individual creatures – "offspring" – are delivered from their…

Q: List one method that increase the genetic variation within gametes.

A: Gametes are the reproductive cells that fuse to produce a zygote. They are produced by the meiotic…

Q: What happens When a gamete is fertilized by a standard haploid gamete ?

A: BASIC INFORMATION  GAMETES  These are basically the reproductive cells of the organisms. Sex cells…

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: 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 are the 8 stages of meiosi

A: Meiosis is a type of cell division in which the parent cell divides twice into four daughter cells…

Q: What is the cause of aneuploidy?

A: Chromosomes are long thread-like structures that carry coded genetic information in the form of DNA.…

Q: The sex of an infant will be female when  The mother's ovary produces testosterone early in…

A: The clinical term that is used to define the unborn yet growing offspring inside a mother's womb is…

Q: Explain step by step in your own words what are the events that follow fertilization

A: Introduction An organism reproduces an offspring that is biologically identical to the organism…

Q: What is the difference between genetic and environmental sex determination?

A: A sex-determination framework is a natural system that decides the development of sexual qualities…

Q: What is the advantage of internal fertilization over external fertilization and vice versa?

A: Question - What is the advantage of internal fertilization over external fertilization and vice…

Q: Why does corpus luteum stay active throughout pregnancy and in the absence of fertilization, is…

A: Introduction We will answer the question in below step.

Q: Describe how a female primordial germ cell can produce multiple gametes.

A: The female reproductive system includes ovaries, uterine tubes or oviduct, uterus, vagina, vulva and…

Q: Why does fertilization always occur in a fluid medium in nature?

A: Fertilization is defined as the union of two haploid gametes, the spermatozoa and the oocyte, herein…

Q: Will you observe fertile gametes if the following were observed cytologically? Explain briefly.

A: Fertile gametes are those in which fusion takes place with one haploid cell to the other haploid…

Q: What is sperm aneuploidy?

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

Q: What does each letter in the crossing over in meiosis represent? The picture below is the example of…

A: A homologous chromosome refers to a pair of chromosomes that are inherited from each parent. They…

Q: What are reciprocal classes of gametes and phenotypes ?

A: Introduction In Mendelian experiments, two contrasting characters are crossed to study the…

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 is double fertilization

A: In plants , apart from the fertilization process of triple fusion and double fertilization takes…

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: Gametes and their genotypes can be observed directly ?

A: The simplest morphological and physiological unit of heredity is the gene. DNA is the material that…

Q: During spermatogenesis, is there any difference in outcome between first- and second-division…

A: Non disjunction-It occurs when pairs of homologous Chromosomes or sister chromatids fail to separate…

Q: Why are enzymes very important in fertilization? What are their biochemical features and properties?

A: INTRODUCTION The enzymes that are important for fertilization are hyaluronidase and acrosin.

Q: why is polyspermy lethal in an egg cell?

A: Polyspermy is defined as the introduction of two or more sperm cells into the cytoplasm of an egg.

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.