Genetics 2
Genetics 3
DNA
Punnett Squares
100
This gene always shows its self over a recessive gene
What is a dominant gene?
100
All human cells contain ____ number of chromosomes
What is 46?
100
How many pairs of chromosomes do humans have?
What is 23?
100
a capital letter represents what type of trait?
What is a dominant trait?
200
Organisms have two different genes for the same trait (Tt).
what is heterozygous?
200
A lowercase letter represents this trait-
What is recessive?
200
Where are chromosomes located?
What is the nucleus?
200
What percent of the offspring will be homozygous?
What is 50%?
300
Organisms have two of the same genes (TT, tt)
What is homozygous?
300
Give any example of a heterozygous gene
Aa, Bb, Cc
(Any letters where there is one capital and one lowercase)
300
The shape of DNA is called the-
What is double helix?
300
What percent of offspring will be homozygous dominant?
25%
400
Shows possible gene combinations.
What is a Punnett square?
400
What is a phenotype?
What an organism looks like?
400
The four protein bases in DNA are:
(Answer must include all 4 to be correct)
Adenine, Thymine, Cytosine, Guanine.
(Order does not matter)
400
What percent of the offspring of heterozygous parents will be homozygous recessive?
What is 25%?
500
This is the term that describes sperm and egg cells. Both of these are types of:
What are gametes?
500
A variation of a gene
What is an allele?
500
Complete the DNA strand below: remember what letters pairs with which letters!
A-
T-
C-
G-
A -
-T
-A
-G
-C
-T
500
What percent of offspring will have the dominant trait?
What is 75%?