7th Grade Genetics

Genetics

100

What is genetics?

The study of heredity.

200

Where are genes located?

In the chromosomes

300

What are the threadlike structures of DNA that carry genes called?

Chromosomes

400

Inherited traits that children get from their parents come from-

Genes

500

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

Genotype

Heredity

100

What is heredity?

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

200

What determines how a tiger gets it's stripes? 

What are their parents and heredity? 

300

What does heterozygous mean in genetics? 

Two alleles or genotypes that are not the same?

400

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

Phenotype

500

How many chromomsomes do humans have?

46 or 23 pair

Reproduction

100

How are traits passed from parents to offspring? 

What is through genes and chromosomes during reproduction?

200

Name two traits that could be inherited from a parent. 

What is: hair color, eye color, skin, height, freckles, widows peak. 

300

What are the squares called that cross capital and lowercase letter to show offspring outcomes?

Punnet Squares

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

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.

Punnet Squares

100

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

Recessive

200

What is the punnet square used for?

To determine the outcome of genetic crossings.

300

A black chicken (BB) is crossed with a black chicken (BB). What percentage of offspring will be black?

100%

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%

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

Inherit what?

100

A bright smile...

What is not inherited?

200

Naturally curly hair...

What is inherited?

300

Ability to do math problems...

What is not inherited?

400

Left or right handedness... 

What is not inherited?

500

The ability to see color...

What is inherited?