genetics notes. detached earlobes roll tonguedimples cleft chincolor blindstraight hairline
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Genetics is the scientific study of heredity.TRANSCRIPT
GENETICS NOTES
Detached Earlobes Roll Tongue Dimples
Cleft Chin Color Blind Straight Hairline
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
Next >
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