Describe the biological basis for the 1 : 1 ratio of malesand females at conception in mammals.

Q: The Mullerian ducts in female mammalian embryos develop into…   a)   The vas deferens   b)   The…

A: During embryonic development, the reproductive system goes through a complex differentiation process…

Q: Of the three polar bodies , one came from an unequal division of the ovum , but from where did the…

A: The process of the formation of the egg within the ovary is called oogenesis. This process is also…

Q: Which of the following is true about identical twins?

A: Answer - They develop from a single fertilized egg that split into two Identical twins are also…

Q: Compare the location and size of the prepuce in the fetal pig and in the human.

A: Anatomy can be defined as a branch of biology that is associated with the study of the organism’s…

Q: What are three notable features between the fertilized and unfertilized egg?

A: Sperms and eggs are the gametes produced by male and female animals respectively in sexual…

Q: Describe the structure of the placenta and the pathways for exchange between maternal and fetal…

A: The placenta is an organ that forms in the uterus during pregnancy and helps in the transport of…

Q: How do the shape and structure of the uterus of the fetal pig compare with that of the human?

A: Reproductive system is used for the sexual reproduction. Female internal reproductive organs include…

Q: Define about  Spermatogenesis and oogenesis in mammals. ?

A: As we know all living organisms are made of  basic unit of structure and function called as cell.…

Q: Discuss the process and pathways of fertilzation in turtles. Also provide or show a diagram how does…

A: In Males there's have one or two penises that pass sperm from their cloaca to the cloaca of a female…

Q: The development of sex and gender is a good example of a developmental cascade because:   Group of…

A: Developmental Cascade:  Developmental cascades refer to collective influences on the development of…

Q: Which sex normally contributes the mitochondrial genes to the offspring?

A: mtDNA (mitochondrial DNA) is found in the mitochondria, cellular organelles inside the eukaryotic…

Q: Why is a second polar body expelled after fertilisation?   a)   To remove excess cytoplasm   b)…

A: The second polar body is a small, non-functional cell that is produced during oogenesis after the…

Q: What is considered to be the fundamental difference between males and females of most organisms?

A: The males and females of almost all species differ from one another in various characteristics.…

Q: What percentage reduction in reproduction does lameness cause in dairy cows?

A: Reproduction refers to the biological process by which new individuals of the same species are…

Q: Describe the role of the SRY gene in mammalian sexual development.

A: The human male genital or reproductive system has two sections, the external and internal male…

Q: In rodent development, what would happen if there was no x-fetoprotein to bind the circulating…

A: Introduction  Alpha-fetoprotein (AFP) is a protein that is normally produced during fetal…

Q: what is the chromosomal system for determining sex in mammals?

A: Chromosomal determination of sex It is also known as allosomic determination of sex and is based on…

Q: Differentiate the primitive streak of the 24-hour from the primitive streak of the 18-hour

A: Primitive Streaks and its peculiar shape at various stages--- Primitive streak is very important…

Q: describe internal and external fertilization, and provide examples of animals that use each of these…

A: Reproduction is the biological process through which a new individual organism is produced. The…

Q: In terrestrial arthropods, fertilization is always internal (True/False)?

A: Arthropoda is the largest phylum in the animal kingdom, which includes such familiar forms as…

Q: What Causes the End of Cleavage in a Frog Embryo?

A: All frogs reproduce sexually, but instead of the fertilization taking place inside the female, it…

Q: What is the Effect of Castration on Nervous System of the Mammalian Male

A: Introduction Castration is any surgical, pharmacological, or other procedure that causes an…

Q: How are the functions of FSH and LH similar in male and female mammals? How do they differ?

A: Hormones are known to be the biological messenger of the body. They are secreted from the ductless…

Q: Describe how genetic divergence and reproductiveisolation are related to each other.

A: The DNA (deoxyribonucleic acid) is the hereditary unit of an organism. It consists of purines and…

Q: Explain in details the ovulation period in female mammals... Example human being

A: The Duration of Female Reproductive cycle is typically ranges from 24 to 35 days. During…

Q: Explain the developmental and functional similarities and differences between:   1. Avian yolk…

A: Three fetal membranes are present in mammals; yolk sac, amnion, and allantois. Yolk sac and…

Q: What mechanisms have evolved in animals with(a) external fertilization and (b) internal…

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

Q: Does the distribution of Ca²+ in an egg correlate with formation of the fertilization envelope?

A: During fertilization, sperm-induced rise in cytoplasmic Ca2+concentration.

Q: Name the mammal who has shortest gestation period.

A: Mammals are vertebrate animals that organize class Mammalia. They have mammary glands which produce…

Q: define asexual reproduction and describe two methods of asexual reproduction in animals

A: Asexual reproduction is a kind of reproduction in which there is no fertilisation since only one…

Q: oviposition for

A: Oviposition is the process of expelling eggs from the oviduct to the external environment.

Q: Describe the basis of sex reversal in humans.

A: Sex-reversal is an event in which the sex of an offspring is opposite to the genetically determined…

Q: Describe the role of the SRY gene in mammalian sexual development.

A: The exterior and internal male genitalia comprise the human male genital or reproductive system. The…

Q: Compare the relative lengths and paths of the uterine tubes (oviducts) of the fetal pig and the…

A: The oviduct is a part of the female reproductive system that provides a passage for the ovum to pass…

Q: Shown here are graphs that plot the percentage of fertilizedeggs containing males against the…

A: Temperature-dependent sex determination (TSD) is a means of non-genetic sex determination in some of…

Q: What is evidence that menopause is an adaptive cooperative trait? In humans, the presence of…

A: Introduction When you have gone 12 months without a monthly period, menopause has set in. Hot…

Q: reproductive

A: Turtle- It is an reptile belongs to order Testudines. these are mainly characterized by a shell…