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Genetics 1
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100
How many dominant alleles are needed for a particular trait to show up?
1
100

An allele that is masked when a dominant allele is present

recessive 

100

If a snake has 36 chromosomes in it's body cells, how many chromosomes did it inherit from the father snake?

18

100
This is the study of heredity
genetics
100

What % would be homozygous recessive in this cross? HH X hh

0%

200

Define heterozygous

One dominant allele one recessive allele

200
What is another word for purebred?
homozygous
200

This type of reproduction is when one cell spits into two

asexual

200

What is a genotype?

The genetic makeup of an organism.

200
This is an organism's physical appearance.
Phenotype
300

A male on a pedigree has hemophilia. Draw what this would look like on the pedigree.

Shaded Square

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
This type of organism has 2 different alleles for a trait
Heterozygous
300
What happens when a recessive allele is paired up with a dominant allele?
It is hidden / doesn't show up
400
This is the passing of physical characteristics from parent to offspring.
Heredity
400

This type of organism has 2 dominant alleles for a trait.

Homozygous dominant

400

Do the following cross (A = freckles, a = no freckles):

Aa x Aa

What are the possible genotypes?

Phenotypes?

AA, Aa, aa

75% Freckles

25% No Freckles

400

What nucleotide pairs with Thymine in DNA?

Adenine

400
This type of organism has 2 recessive alleles for a trait
Homozygous recessive
500

Draw a two generation pedigree for a dog family. The parents just had 5 puppies. Two are male and three are female.

Check drawings

500
This was the scientist who first began studying heredity and genetics.
Gregor Mendel
500

A section of DNA is called

a gene

500

If a strand of DNA has 30 Cytosine nucleotides, how many Guanine nucleotides must be present?

30

500

Do the following cross where B = blue eyes, b = brown eyes.


Bb x bb

Genotype?

Phenotype?

Bb, bb

50% Blue Eyes

50% Brown Eyes