Your cousin just had twins. She tells you that twinning occurs when two sperm fertilize the same egg. You reply when two sperm fertilize the same egg. What will be your reply?

Q: Explain why a triploid individual is usually infertile?

A: The individual having three sets of haploid chromosomes (3n) is termed as triploid. Triploid…

Q: What is myometrium?

A: The uterus is an inverted pear-shaped muscular pouch which is a part of female reproductive system.…

Q: Explain the role of placenta for human life ?

A: Placenta act as channel to exchange matter from mother to foetus. Placenta bind to foetus with the…

Q: At which stage of development does XCI initially occur?

A: In many species, genes located on the sex chromosome determined the sex of an individual. In…

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: Name the process of surgical removal of gonads.

A: The term gonads refer to the male testis and female ovaries. Gonad is a mixed gland that generates…

Q: Explain why there is a high level of estrogen and progesterone once in every 28-day uterine cycle of…

A: Menstruation is a complicated mechanism that occurs in every female for about 28 days after puberty.…

Q: What happens if the fallopian tubes are partially blocked and the ovulated eggs are prevented from…

A: The fallopian tubes are two thin tubes located on each side of the uterus. It is the site of…

Q: What is an ectopic pregnancy?

A: Ectopic pregnancies exist in around one out of every 50 conceptions, as per the statistics of the…

Q: Why is the blood-testis barrier necessary?

A: Testis : This is important structure in male reproductive system. The testes are oval organs about…

Q: What is yolk? What is its role in fertilization and development?

A: The development of organisms depends on the supply of resources. In embryo development nutrition of…

Q: What is the significance of cleavage during the early stages of development?

A: The cleavage is the division of cells in the early stage of an organism. This implies that with each…

Q: What technology would enable a fetus born in the fourth month to survive in a laboratory setting?…

A: First of all, it is nearly impossible that four months (12 or 13 weeks) fetus can survive outside…

Q: Differentiate telophase I vs. telophase II

A: Meiosis type of cell division takes place in two phases: meiosis I and II. These phases are further…

Q: How old is an ovulated oocyte of a 35-year-old woman? What consequences does this have?

A: Fertility changes with age. For a woman, the beginning of their reproductive year starts onset of…

Q: What structural features of the endometrium and myometrium contribute to their functions?

A: Uterus is one of the important organ of the female body. It serves many important functions in the…

Q: How does the oocyte nucleus move during oogenesis?

A: Oogenesis: Otherwise called as ovogenesis. This is a process that happens during the embryonic…

Q: Which gene is responsible for the development of the gonads into testes?

A: Introduction Chromosomes are classified into two types: Autosomes and Allosomes/Sex chromosomes. The…

Q: What barriers must a sperm cross in order to fuse with the egg? How does the sperm accomplish this…

A: The union of two haploid gametes, the spermatozoa and the oocyte, hereafter referred to as the egg,…

Q: Oogenesis is the formation of the ovum within a follicle. A mature follicle containing an ovum,…

A: Answer : b.5 A mature follicle containing an ovum, prior to ovulation is called Graafian follicle

Q: what does a oogenesis concept map with 10 words or phrases look like?

A: oogenesis concept map :-

Q: Which hormone is inhibited during pregnancy in order to prevent contractions of the uterus? Which…

A: Anatomical and physical changes evolve in various organ systems while during the stage of delivery…

Q: If one follows 32 primary oocytes in an animal through their various stages of oogenesis, how many…

A: Oogenesis is the process of producing eggs in the ovaries. Eggs are haploid cells having half 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: What is oogenesis? Give a brief account of oogenesis.

A: The female reproductive organs comprise primary sex organs (ovaries) as well as accessory sex…

Q: You are the product of all the genetic information contained in the fertilized egg cell at the…

A: Sexual reproduction- In this fusion of male and female gamete occurs. In this fusion of two gametes…

Q: What is the purpose of the placenta? Which part of the blastocyst eventually becomes the fetal…

A: Introduction  An organ that grows in the uterus during pregnancy is the placenta. A developing…

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: How is the child affected if it has grown from the zygote formed by an XX-egg fertilized by…

A: Zygote is also known as a fertilized egg because it is formed by the process of fertilization in…

Q: The chromosomal abnormality that causes a man to have asexual to feminine body contours with large…

A: Chromosomal abnormalities are the type of genetic disorders caused due to the change in one or many…

Q: following is an example of epistasis?

A: Epistatis: It is defined as the the action of masking one gene upon expression of another gene. Even…

Q: Can sperm with DNA fragmentation fertilize an egg?

A: The process that involves fusion of the male and female gametes namely sperm and ovum respectively…

Q: What is endometriosis and what causes it?

A: The female reproductive system consists of the ovary, oviduct, uterus, cervix and the vagina. The…

Q: Draw and label the following parts: (a) membrane coverings of gonads (b) supporting cells of gonad…

A: (a) The membranes covering the male gonads (testis) are: (1) Tunica vaginalis, (2) Tunica albuginea,…

Q: How is the yolk formed?

A: Cells are the basic structural and functional units of life. These are the building blocks that make…

Q: Why is fetal Hb essential for the survival of placental animals?

A: Hemoglobin is an oxygen transport protein in mammals. It is made up of four sub-units. Adult…

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: normal sequence of developmental stages is...

A: Correct sequence zygote--> morula--> blastocyst--> embryo--> fetus

Q: What is the name of the stem cells that form mature sperm?

A: The development of haploid spermatozoa from germ cells in the seminiferous tubules present in the…

Q: For successful reproduction to occur, various gonadotrophic hormones need to be involved. What…

A: Reproduction implies reproduction. Reproduction is the biological process by which an organism…

Q: Can sperm DNA fragmentation be fixed?

A: It refers to the presence of abnormal genetic material within the sperm, which may lead to male…

Q: How are the events that take place in spermatogenesis and oogenesis similar? How are they different?

A: Spermatogenesis and oogenesis are the cycles of arrangement of male and female gametes.…

Q: Shared germs as well as shared genes produce identical twin similarities. Explain

A: Germ cells also referred as sex cells pertains to sperms and eggs that are produced as a result of…

Q: How do the processes of capacitation and acrosome reaction affect the fertilization process? How do…

A: Introduction  Fertilization refers to the process when there is a fusion of male and female gametes…

Q: why is it important that the gametocytes is unique from the other?

A: Introduction : During gametogenesis, eukaryotic germ cells called gametocytes undergo mitosis to…

Q: Why would the absence of a father affect the timing of puberty?

A: Puberty is defined as the stage when a child starts to grow sexually. During this stage, physical…

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.