Alternation of generations Notes: Definitions & Explanations PDF | Download eBooks
Study Alternation of generations lecture notes PDF with biology definitions and explanation to study “What are Alternation of generations?”. Study alternation of generations explanation with biology terms to review biology course for online degree programs.
Alternation of generations Definitions:
Plants and some species of algae exhibit a type of life cycle called alternation of generations in which they exhibit both diploid and haploid stages.
Campbell Biology by J.B. Reece, L.A. Urry, M.L. Cain, S.A. Wasserman, P.V. Minorsky, R.B. Jackson
Alternation of generations is the alternation of multicellular haploid and diploid forms in certain organisms.
Campbell Biology by J.B. Reece, L.A. Urry, M.L. Cain, S.A. Wasserman, P.V. Minorsky, R.B. Jackson
Alternation of generations Notes:
Alternation of generations, which is also known as metagenesis, is the type of life cycle that occurs in those plants and algae in the Archaeplastida and the Heterokontophyta that have distinct sexual haploid and asexual diploid stages. In these groups, a multicellular gametophyte, which is haploid with n chromosomes, alternates with a multicellular sporophyte, which is diploid with 2n chromosomes, made up of n pairs. A mature sporophyte produces spores by meiosis, a process which reduces the number of chromosomes to half, from 2n to n. Alternation of generations is a type of life cycle found in terrestrial plants and some algae in which succeeding generations of individuals alternate between haploid and diploid organisms. This can be contrasted to sexual reproduction in animals, in which both haploid and diploid cells are found in every generation. This process does not happen in humans and rarely ever happens in any animals and is exclusive to plants only.
Keep Learning with Biology Notes
What is Microvilli?
Microvilli are microscopic protrusions that extend from the cell membrane. These are distinct from flagella and those are larger and ...
What are Zoospores?
A zoospore is a motile asexual spore that uses a flagellum for locomotion so these are generally called the flagellated ...
What is Fermentation?
This process has different definitions in biochemistry and biological terms. Here fermentation is being referred to the process in which ...
What is Molarity?
Molarity is the unit of concentration and is described as the amount of solute dissolved pe mass of solvent. In ...
What is Fever?
A fever is a body temperature that is higher than normal. A normal temperature can vary from person to person, ...
What is Immune and lymphatic system?
Body defense (fighting infections and cancer). ...