HOW SEX REPRODUCTION CREATES GENETIC VARIATION

     Sexual reproduction increase genetic variation in offspring. Which in turn increase the genetic variability in species. You can see the effects of this genetic variability if you look at the children in a large familyand note how each person in unique you know ( not to mention, all the families of all the sexually reproducing organisms on earth ). And you begin to get a feel for dramatic genetic impact of sexual reproduction.

MUTATION

     DNA polymerase occasionally makes uncorrected mistakes when copying a cell's genetic information during DNA replication. These mistakes are called spontaneous mutations and they introduce changes into genetic code.

CROSSING - OVER

       When homologous chromosomes come together prophase I of meiosis, they exchange bits of DNA with each other. This crossing over result in new gene combination and new changes for variety.

INDEPENDENT ASSORTMENT

       Independent assorment occurd when homologous chromosomes separate during anaphase I of meiosis.

FERTILIZATION

     Fertilization presents yet another opportunity for genetic diversity. Imagine millions of genetically different sperm swimming toward an egg.

NONDISJUNCTION

       Nothing's perfect, even in the cellular world, which is why sometimes meiosis doesn't separate the way they're supposed to, that's called nondisjunction.

PINK AND BLUE CHROMOSOMES

       Ever wish you could've been born the opposite sex so you wouldn't have to spend so much of your budget on make up or shave your face everyday every morning?

Sorry, but that was never really your decision to make, like all others genetic characters, gender is determined at chromosomal leverl

Genetics

     

   Genetics is the branch of biology that looks at how parents pass traits on to their offspring. It all started more than 150 years ago when a monk named Gregor Mendel conducted breeding experiments with pea plants that led him to discover the fundamental rules of inheritance. Although, Mendel worked with peas. His ideas explain a lot why you look and function the way you do.

     Dogs have puppies, hens have chickens and your parents had you. What do all three sets of parents have in common?. They all passed their traits on to their offspring. Traits that are inherited from one generation to the next are called heritable traits. When living things reproduce, they make copies of their DNA. the DNA is the genetic code for the traits of organism, which means the parent's blue print. Of course, in sexually reproducing species, offspring aren't exactly like their parent for several reasons.

• Offspring receive half of their genetic information from their father and half from their mother.
• Even heritable characteristic can change slighty.
• Some traits are acquired rather than inherited.
• Some inherited traits are affected by the environment.

 If you want to know more about genetics, just click this link :)