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WorksheetsGenetics Unit Test
Total questions: 25
Worksheet time: 33mins
Pairs of genes that control the same trait are known as
alleles
hybrids
gametes
loci
In pea plants, the gene for purple flowers (P) is dominant over the gene for white flowers (p). What is the ratio of genotypes that will result if a homozygous purple flowered plant (PP) is crossed with a white flowered plant (pp)?
25% PP: 50% Pp: 25% pp
100%PP
50%PP: 50%pp
100% Pp
If T (Tall) is dominant over t (short). What is the phenotype ratio for a cross between a heterozygous tall individual (Tt) and a homozygous short individual (tt)?
25% tall, 75% short
50% tall, 50% short
75% tall, 25% short
100% tall, 0% short
Using the pedigree chart, What is the relationship of individual 1 to individual 2?
Individual 1 is the grandparent of individual 2
Individual 1 is the great grandparent of individual 2
Individual 1 is the great grandson of individual 2
Individual 1 has no relationship to individual 2
Using the pedigree chart shown, what is the genotype of individual 1's daughter?
EE
Ee
ee
Can't be determined
Which of the following genotypes is homozygous recessive?
A
Aa
AA
aa
What pattern of inheritance is each organism showing in the image?
1 - complete dominance, 2 - codominance
1 - codominance, 2 - incomplete dominance
1 - codominance, 2 - complete dominance
1 - incomplete dominance, 2 - codominance
Radish flowers may be red, purple, or white. A cross between a red-flowered plant and a white flowered plant yields all-purple offspring. This type if inheritance is called
incomplete dominance
codominance
dominant and recessive
In some chickens, homozygous dominant is black, heterozygous is black and white speckled, and homozygous recessive is white. This type of inheritance is called
codominance
incomplete dominance
sex linked
What part of the cell contains the genetic material?
Cell membrane
cytoplasm
nucleus
mitochondria
The offspring of sexual reproduction receive ______.
Genetic material from one parent
Genetic material from an outside source
Genetic material from two parents
When you have a dominant gene and a recessive gene for a trait, what will be the outcome? (Hybrid)
The dominant trait will always be shown
The recessive trait will always be shown
A combination of the dominant and recessive trait will be shown
Look at the table above, among the offspring, what is the ratio of dominant to recessive for this trait?
1:3
3:1
2:2
1:2:1
Which genotype represents a female who is a carrier for hemophilia?
Which genotype represents a male with hemophilia?
In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X R Y ?
male with white eyes
female with white eyes
male with red eyes
female with red eyes
In fruit flies, eye color is a sex linked trait. Red is dominant to white. What is the sex and eye color of flies with the following genotype: X R X R ?
male with red eyes
female with red eyes
male with white eyes
female with white eyes
The blending of two traits is known as ---
incomplete dominance
codominance
A condition in which both alleles for a gene are expressed so that both traits are visible is known as ---
Codominance
Incomplete dominance
What type of inheritance pattern is shown here?
Codominance
Incomplete dominance
This is an example of ---
Incomplete dominance
Codominance
Some flowers are controlled by codominance. Red flowers (FRFR), blue flowers (FBFB) and Speckled flowers (FRFB).
Cross a red flower with a speckled flower. What is the phenotypic ratio?
50% red, 50% speckled
25% red, 25% blue
100% blue
