Genetics
Heredity
Vocabulary
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 young of a plant or animal

Offspring

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

The different forms of genes are known as

Alleles

200

Characteristics that an organism develops after its born.

Acquired traits

200
What is the punnet square used for?
To determine the outcome of genetic crossings.
200

 G = dominant green and g = recessive yellow
A fish has a Gg genotype, what will its phenotype be?

Green

300

How many alleles (letters) do each person carry for a trait?

2

300

 Two of the same genes for a trait (sometimes called purebred). BB or bb

Homozygous

300

Something inherited from your parent. This also tells your body how to work.

genes

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

For some traits, only one copy of a particular gene is needed to show a given trait. These genes are referred to as-

Dominant

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

T or F The mom is 5'4" and the dad is 5'10". Their son is 6'2". This is possible. True or False: Explain your answer.

True

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

molecule found in the nucleus of a cell and shaped like a double helix; carries and transfers genetic information

DNA

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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