WorksheetsUnit 4 Genetics Practice Quiz
Total questions: 20
Worksheet time: 17mins
A segment of DNA that codes for a trait
gene
centromere
chromosome
chromatid
an observable characteristic
trait
personality
cell
DNA
Genetic traits are determined by one or more
genes
organelles
random chances
cells
A version or variation of a gene
trait
gene
allele
DNA
The alleles that an organism has/inherits are its
genotype
phenotype
chromosome
recessive
The observable expression of a trait is its
phenotype
genotype
chromosome
allele
When an organism has two of the same alleles, it is called
homozygous
heterozygous
recessive
dominant
When an organism has two different alleles, it is called
homozygous
heterozygous
recessive
dominant
The physical expression of a trait.
phenotype
genotype
chromosome
allele
Each one of the boxes on the Punnett square represents what probability of an offspring's genotype?
25%
1%
10%
0%
Aa, DD, Ba, and yy are all examples of ---
genotypes
phenotypes
AA and Aa always show up as ---
dominant.
recessive.
What is ratio of the offspring from the cross shown will be homozygous recessive for the trait of tallness? T = tall t = short
0 in 4
1 in 4
2 in 4
4 in 4
Which of the following genotypes is homozygous dominant?
aa
Aa
AA
Brown eyes are dominant over blue eyes. What is the probability that the offspring will have brown eyes in this cross?
25%
50%
75%
100%
What are the possible phenotype(s) of the offspring? (A-Brown hair; a-blond hair)
50 % Brown Hair and 50% Blond Hair
25 % Brown Hair and 75% Blond Hair
75 % Brown Hair and 25% Blond Hair
0% Brown Hair and 100% Blond Hair
What is the probability of heterozygous offspring?
0%
100%
50%
25%
