GENETICS NOTES

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                  Genetics is the scientific study of

heredity. 

Heredity is the process in

which characteristics

are passed from the

parent to the offspring (Mom

or Dad to Child).

 

Traits are an organisms physical characteristics.

Ex: eye color, height, nose shape

These traits are inherited on CHROMOSOMES (hold DNA inherited

from parents)

  Traits are controlled by a small section of your DNA (our genetic

code)

We call that section, a GENE!(The small segments of a DNA molecule that contain specific

trait information)

The different forms, or parts of a gene are called alleles                                           

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Alleles Some genes have different forms, these are

known as alleles.

Example: Take hair color as an example.

The alleles for red hair are different to the

alleles for brown hair, and these are different

to the alleles for blond

hair.The allele combinations

that you possess are responsible for your

unique mix of characteristics.

   Alleles are represented by letters

Usually, letters represent dominant alleles and lower case

letter represent recessive alleles.

Dominant allele is the one whose trait always shows up.

Recessive allele is hidden, or covered up, whenever a dominant

allele is around

(The only time you see a recessive alleles trait is when there are two

recessive alleles and no dominant).

Heterozygous means Different Genes (alleles)

Example: Tt

Homozygous means Same Genes (alleles)

Example: TT or tt

GenotypeThe code of your genes (Ex. Tt, EE)

PhenotypePhysical appearance (brown hair)

 

What is the passing of genetic instructions from one generation to the next known as?

Question 1

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A) Allele transfer

B) Genetic transfer

C) Heredity

D) Heredity traits

What is the passing of genetic instructions from one generation to the next known as?

Question 1

Next >

A) Allele transfer

B) Genetic transfer

C) Heredity

D) Heredity traits

“Genes store the information that causes heredity traits to pass from one generation to

the next."Is this statement true or false?

Question 2

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Answer true or false.

“Genes store the information that causes heredity traits to pass from one generation to

the next."Is this statement true or false?

Question 2

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Answer true or false.True

Asexual and Sexual ReproductionIn asexual reproduction, only one

parent is needed to produce offspring. The offspring will be

IDENTICAL to the parent.

Things that reproduce asexually include:

1.  one celled organisms (like bacteria)

2. some plants3. some frogs

In sexual reproduction, two parents are needed to produce

offspring. The offspring will NOT be identical to the parents.

THE END