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WorksheetsBiology Unit 4 Test
Total questions: 35
Worksheet time: 34mins
A segment of DNA that codes for a trait
gene
allele
chromosome
chromatid
an observable characteristic
trait
gene
allele
DNA
Genetic traits are determined by one or more
genes
chromosomes
random chances
cells
A version or variation of a gene
trait
gene
allele
DNA
The alleles that an organism has
genotype
phenotype
chromosome
recessive
The observable expression of a trait
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
This type of allele is expressed whether there are one or two copies present.
dominant
recessive
homozygous
heterozygous
These types of alleles are only expressed if the organism has two copies
dominant
recessive
homozygous
heterozygous
An SS fly could be described as (Check all that apply.)
homozygous
heterozygous
dominant phenotype
recessive phenotype
An Ss fly could be described as (Check all that apply.)
homozygous
heterozygous
dominant phenotype
recessive phenotype
An ss fly could be described as (Check all that apply.)
homozygous
heterozygous
dominant phenotype
recessive phenotype
The genotype Aa is best described as
heterozygous
homozygous
The genotype gg is best described as
heterozygous
homozygous
In pea plants, purple flowers (P) are dominant to white flowers (p). The phenotype of a PP plant would be
purple
white
homozygous
heterozygous
In pea plants, purple flowers (P) are dominant to white flowers (p). The phenotype of a pp plant would be
purple
white
homozygous
heterozygous
In pea plants, purple flowers (P) are dominant to white flowers (p). The phenotype of a Pp plant would be
purple
white
homozygous
heterozygous
