Genetics
Heredity
Miscellaneous
Punnet Squares
Extra Tough
100

True or false, A segment of DNA is called a trait

false, gene

100
What is heredity?
The passage of genetic instructions (traits) from parent to offspring.
100

What is a mutation? a.) someone who has been exposed to radiation and turns into a superhero b.) a permanent change in the sequence of DNA in a gene c.) Someone who can't speak d.) When genes are based on from generation to generation

a) a permanent change in the sequence of DNA in a gene

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

What can NOT influence an organism’s phenotype? a. genotype c. environment b. mutation d. behavior

d.) Behavior does not influence an organism’s phenotype.

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

Which is NOT an inherited trait? a. the size of a cat c. the colour of a flamingo b. the colour of hair d. blood type

c.) Flamingos get their colour from the food they eat.

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

If tall eyeballs (T) are dominant to short eyeballs(t), give the genotypes that are possible for members of Mr. Krabbs’ family. Tall eyeballs = ___________________ Short eyeballs = ______________________

Tall eyeballs - TT, Tt; short eyeballs - tt 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

What are alleles?

They are different forms of a gene for a single traits (brown eyes vs blue eyes)

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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