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

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: 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: 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: Explain why breastfeeding can have lifelong, favorable consequences for the development of infants…

A: *Basically in the poverty stricken areas they are unable to consume the required diet as lack of…

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: Outline the process of double fertilization, and explain the advantage it confers

A: Flowers are the site of sexual reproduction in flowering plants. Sexual reproduction in flower can…

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: Define about Maternal care in mice. ?

A: Maternal care can be defined as the mothers' behavior to take care of their newborn babies. In mice,…

Q: Why does external fertilization lead to an increase of genetic variation?

A: Reproduction is the biological phenomenon by which offspring are produced by individual organisms.…

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: 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: . Describe the phenomenon of double fertilization.

A: Meiosis is a type of cell division (CD) where four gametes or daughter cells are produced as a…

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: 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: how nutrients are exchanged from the mother to fetus during pregnancy

A: As a common needs food for growth, development to stay being healthy a fetus also needs nutrients…

Q: Explain about double fertilisation.

A: Nawaschin was the first to show that both male and female gametes are involved in fertilisation in…

Q: Is Barr's Corpuscle a Reliable Tool for Sex Determination?

A: Canine morphology is used for the determining the sex. However aside from this technique, X and Y…

Q: Give account of events that occur following mating and before the onset of cleavage in mammals

A: The vertebrate animals that have the ability to give birth to young ones and can provide nourishment…

Q: Describe the processes and result of double fertilization.

A: In angiosperms, or flowering plants, double fertilisation is a special perspective of the…

Q: Neurulation in model vertebrates and in fly follows soon after gastrulation. Do vertebrates and…

A: "The development of the nervous system is a complex process that occurs during embryonic development…

Q: n your own words: Expound how the mass of inert yolk influences gastrulation in amphibians,…

A: In evolutionary biology, evolutionary developmental biology is considered a new norm. It developed…

Q: when a woman is injected with an egg fertilized in vitro, the probability of its implanting is 20…

A: Implantation The process of attachment of embryo with uterus is known as implantation.

Q: What determines sex in birds, reptiles, humans, ants, and bees?

A: In most of the animals, sex is determined by sex chromosomes.

Q: Compare and contrast the three types of mammals with respect to fetal development and birth: the…

A: Fetal development begins with implantation when the sperm fertilizes the egg. At this point, the…

Q: Explain maternal stunting in detail  Provide examples

A: Stunting is a serious public health issue characterized by slow physical growth in young children.…

Q: All of the following events occur by the end of the eighth week of gestation EXCEPT Select one: a.…

A: The process of fertilization, that is, the fusion of male and female haploid gametes, leads to the…

Q: Female mammals undergo continuous reproductive cycles during their reproductive life. In the sense…

A: Introduction:- Although different species have different reproductive techniques, mammals in general…