Chromosomal Mutation

Chromosomal Mutation

Mutation: Sudden and abrupt changes to the genetic material of organisms. → Spontaneous change by mutagens that affect on the DNA or the genes or sometimes the complete chromosome. A.) CHROMOSOMAL MUTATION → A parmanent change in the number of chromosome or structure of chromosome of a organisms is called chromosomal mutation. Two types →Variation … Read more

Late Embryonic Development

Late embryonic development is the phase where organs and structures continue to develop and mature in the embryo before birth. Fate of Embryonic layers There are 3 Germ layers – Ectoderm Mesoderm & Endoderm. 1. Ectoderm: 2. Mesoderm 3. Endoderm: Extra embryonic membrane: There are 4 types of Extra embryonic Membrane: – Amnion, Chorion Allantois … Read more

Early Embryonic Development

Early embryonic development begins with fertilization, where a sperm cell merges with an egg to form a zygote. The zygote undergoes rapid cell divisions called cleavage, forming a multicellular structure called a blastocyst. The blastocyst implants itself into the uterine wall, where it differentiates into an inner cell mass (which will become the embryo) and … Read more

Protozoa

Definition: Microscopic, eukaryotic unicellular organism commonly motile heterotrophic having one or more nuclei called protozoa. General Characteristics: 1)Habitat: Protozoans exhibit mainly two forms of life: Free living (aquatic) and parasitic (ecto-endo parasite). 2) Cell size: The body is microscopic and unicellular. 3) Type: They are the simplest and most primitive of all animals. 4) Organisation: … Read more

Class Mammalia

Class Mammalia comprises warm-blooded vertebrates with characteristics such as hair or fur, mammary glands for feeding young, and three middle ear bones. Mammals include a wide range of species, from humans and whales to bats and rodents, inhabiting diverse environments worldwide. General Characters:  1. Body covering: Body is covered by epidermal hair. 2. Mammary Gland: Mammary glands are present, … Read more