Genetics
Heredity
Key Words
Punnet Squares
Misc
100
What is genetics?
The study of heredity.
100

What is heredity?

The passage of genetic instructions (traits) from parent to offspring.

100

The stronger trait is considered to be______________.

Dominant

100

Some genes can be hidden or covered up by another. These are considered to be-

Recessive

100

How are traits passed from parent to offspring?

Through genes during reproduction

200
Where are genes located?
In the chromosomes
200
Who first studied heredity and the passage of traits from one generation to the next?
Gregor Mendel
200

The weaker trait is considered to be _______________.

recessive

200
What is the punnet square used for?
To determine the outcome of genetic crossings.
200
Name two traits that could be inherited from a parent?
Examples: hair color, eye color, height, skin color, freckles, etc...
300
What are the threadlike structures of DNA that carry genes called?
Chromosomes
300

What type of organism did Gregor Mendel use to first study heredity?

Pea Plants

300

what does DNA stand for

deoxyribonucleic

300
A black chicken (BB) is crossed with a black chicken (BB). What percentage of offspring will be black?
100%
300
Why does a Punnet Square use capital and lowercase letters?
Capital = Dominant Trait Lower Case = Recessive Trait
400
Inherited traits that children get from their parents come from-
Genes
400

The physical trait observed in an offspring is known as it's -

Phenotype

400

Two of the same alleles is called_________________.

Homozygous 

400
Having dimples is dominant (D). Not having dimples is recessive. (d) Both parents are heterozygous for the dominant trait. What percentage of the children will NOT have dimples?
25%
400

How many parents are involved in asexual reproduction (self-pollination)?

One

500
What do we call the genetic make up of the individual, represented by a set of letters?
Genotype
500

How many chromomsomes do humans have?

46 or 23 pair

500

Two different forms of a trait is called_____________________

Heterozygous 
500
Long ears are dominant (E) in rabbits. If one parent is homozygous dominant for the long ear trait and the other homozygours reccessive (e), what is the only possible genotype of the offspring?
Ee
500
Two dark brown rabbits have four offspring. Three of the offspring are dark and one is white. What does this tell you about the parents' genes for fur color?
Dark brown is dominant and white fur is recessive. Both parents are heterozygous.
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