Reproduction

DNA

A chromosome is a structure of DNA, protein, and RNA found in cells. It is a single piece of coiled DNA containing many genes, regulatory elements and other nucleotide sequences.

A gene is the molecular unit of heredity of a living organism.

cellsToDNA

Asexual reproduction is a mode of reproduction by which offspring arise from a single organism, and inherit the genes of that parent only.

asexual reproduction

Sexual reproduction
is a process that creates a new organism by combining the genetic material of two organisms.

9_sex_cells

There are two main processes in sexual reproduction.

1.  Meiosis –  is a type of cell division necessary for sexual reproduction in  animals, plants and fungi.  The number of sets of chromosomes in the cell undergoing meiosis is reduced to half the original number, typically from two sets to one set.
The cells produced by meiosis are called gametes.  In many organisms, including all animals and land plants gametes are called sperm in males and egg cells or ova in females.

2. Fertilization – involving the fusion of two gametes and the restoration of the original number of chromosomes.

 

The gamete (sperm or egg) carries one full set of chromosomes that includes a single copy of each chromosome.

Avian sperm
Osprey male gamete (sperm cell)

The female gamete (the egg or ovum) is the female haploid reproductive cell.

eggcrosssection
Osprey ovum (the egg)

The egg cell is not capable of active movement, and it is much larger than the motile sperm cells.

When egg and sperm fuse, a diploid cell (the zygote) is formed, which gradually grows into a new organism.

images (2)
Osprey zygote

When does life begin? Does a zygote have a soul? Is live on earth precious? Is it worth saving? Is life on earth dispensable in the interest of higher forms? What if the inter-galactic DOT wishes to build a modern cosmic space though-o-fare that planet earth obstructs?  Eminent domain?

What happens next is even more amazing.

The web site is;
https://ospreytales.wordpress.com/

 

 

About Harriett Raptor

Harriett O. Raptor 8-year-old mother of five, lifelong mate of Ozzie Raptor until he perished last year, fluent in telepathy with The Doctor and possessor of genetic memory. She is an intellectual, a scholar, philosopher and thinker; a wise, learned osprey especially distinguished for her expertise on the H. sapiens problem.
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5 Responses to Reproduction

  1. Tricia says:

    Thank you for your extensive research, information and education

    • “No problem”, said Harriett. “It’s just basic knowledge”.

      Its? It’s? or Its’?

      1. It’s is the contraction (abbreviated form) of “it is” and “it has.” It’s has no other meanings–only “it is” and “it has.”

      2. Its is the form to use in all other instances when you want a form of i-t-s but you are not sure which one. Its is a possessive form; that is, it shows ownership the same way Ozzie’s or Harriett’s does.

      Example: The channel marker lost its nest.

      The tricky part of the its question is this:

      If we write “Ozzie’s nest” with an apostrophe, why do we write “its footprints” without an apostrophe?

      Here is the explanation: Its is like hers, his, ours, theirs, and yours. These are all pronouns. Possessive pronouns do not have apostrophes. That is because their spelling already indicates a possessive. For example, the possessive form of she is hers. The possessive form of we is ours. Because we change the spelling, there is no need to add an apostrophe to show possession
      It’s
      It’s is short for it is or it has. This is a 100% rule. It cannot be used for anything else. If you cannot expand it’s to it is or it has, then it is wrong.
      Its
      Its is like his and her.

      His is used for a masculine possessor (owner). (This is his fishing ground.)
      Her is used for feminine possessor. (These are her baby chicks.)
      Its is used for neuter possessor. (These are its footprints.)

  2. Mark Merrick says:

    🙂

  3. I look forward to receiving Osprey Tales. Thanks for sharing your extensive knowledge about so many things.
    .

  4. Granny Lou, Thank you for your interest. Next up will be: Incubation. Hope you enjoy.

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