Show:
Genetics
Heredity
Punnet Squares
Misc
Vocabulary
100
What is genetics?
The study of heredity.
100

DNA is stored here in a cell.

Nucleus

100

What is the punnet square used for?

To determine the probability for the trait to show up in the offspring.

100
How are traits passed from parent to offspring?
Through genes during reproduction
100
The physical trait observed in an offspring is known as it's -
Phenotype
200
Where are genes located?
In the chromosomes
200
How many chromomsomes do humans have?
46 or 23 pair
200
A black chicken (BB) is crossed with a black chicken (BB). What percentage of offspring will be black?
100%
200
Name two traits that could be inherited from a parent?
Examples: hair color, eye color, height, skin color, freckles, etc...
200
What do we call the genetic make up of the individual, represented by a set of letters?
Genotype
300
What are the threadlike structures of DNA that carry genes called?
Chromosomes
300

What is a pedigree and what is it used for?

an organized representation (model) of biological relationships

Often used to prove if an animal is purebred.

300
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%
300
Why does a Punnet Square use capital and lowercase letters?
Capital = Dominant Trait Lower Case = Recessive Trait
300

Having 2 of the same allele for a gene.

Homozygous

400
Inherited traits that children get from their parents come from-
Genes
400
Some genes can be hidden or covered up by another. These are considered to be-
Recessive
400
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
400

What is sexual reproduction?

When an egg cell and a sperm cell combine to develop into an offspring.

400
Having different alleles for a gene.

Heterozygous

500

Explain how an animal's genotype leads to the phenotype.

Genotype to proteins to protein job to phenotype

500

Different forms of the same gene that are found on the same place on a chromosome.

Alleles

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.
500

What is the job of a chromosome?

To carry genetic instructions for making proteins, which have jobs in the body.

500

What is a mutation?

A small change that happens to the structure of a chromosome that can be passed to future offspring, but wasn't there before.