Challenge ?'s
Genetics 2
Genetics 3
Genetics 4
Genetics 5
100
What is another word for purebred?
homozygous
100
This was the scientist who first began studying heredity and genetics.
Gregor Mendel
100

What type of letter represents a recessive trait? Write an example

any letter that is lowercase

a, s, t, p, l, etc. 

100

Different forms of a gene.

alleles

100

TT and tt are both examples of a ___________ trait.

purebred/homozygous

200
What is another word for heterozygous?
hybrid
200
How many dominant alleles are needed for a particular trait to show up?
1
200

This occurs when egg and sperm join to make offspring.

fertilization

200
This is an organism's genetic makeup.
Genotype
200
This is an organism's physical appearance.
Phenotype
300
This is a number that describes how likely it is that an event will occur.
Probability
300
An organism with 2 different alleles for a trait is called a ______.
Hybrid/heterozygous
300
This shows all of the possible outcomes of a genetic cross.
Punnett square
300

Red is dominant to pink in flowers. Show all possible genotype combinations and their correct phenotypes. Use the letter R

RR - red

Rr - red

rr - pink

300
What happens when a recessive allele is paired up with a dominant allele?
It is hidden / doesn't show up
400
What did Gregor Mendel cross-pollinate in his genetics experiments?
Plants / pea plants
400
This type of organism has 2 dominant alleles for a trait.
Homozygous dominant
400

What do the letters represent that go on the outside of the Punnett square?

The parents traits and what is being crossed

400

This occurs when 2 traits are both dominant and both show up.

co-dominant / codominance

400
This type of organism has 2 recessive alleles for a trait
Homozygous recessive
500
This is the passing of physical characteristics from parent to offspring.
Heredity
500

If a white flower and red flower are crossed, what color would the offspring be in an incomplete dominance crossover?

Pink...due to blending of the traits 

500

Straight hair is dominant to curly hair. Show a cross between one person with heterozygous straight hair and another person with curly hair. Write down all genotypes and phenotypes and tell me the percentage of each one. Use the letter H

Hh x hh

50% Hh - straight

50% hh - curly 

500

Neither trait is dominant over the other and the two blend together.

Incomplete Dominance

500

If a black dog and a white dog have a puppy and the puppy turns out white with black stripes. What is this an example of? 

Co-dominance 

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