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WorksheetsNon-Mendelian Genetics
Total questions: 20
Worksheet time: 1hrs 2mins
When more than two versions of a gene for a particular trait exist in the human population, it is a ____________________ trait.
sex-linked
polygenic
epistatic
multiple allele
A gene that is found on the X or Y chromosome is called a(n)
codominant gene
autosomal gene
somatic gene
sex-linked gene
Why do humans have a range of phenotype possibilities when it comes to eye color?
eye color is controlled by the combined effects of many different pigment genes
the gene for eye color is very long in its DNA sequence and it codes for multiple pigment proteins
eye color is controlled by sex-linked genes and therefore eye pigments differ between males and females
eye color is controlled by a recessive allele and pigment is either present or not present
When two alleles are expressed equally in a heterozygous individual and their phenotype is a blend or mix of the homozygous phenotypes
polygenic
incomplete dominance
codominance
pleiotropy
A roan cow shows codominance in fur color (brown and white). What is the phenotype ratio expected in offspring a female roan and a male roan mate together?
All four would be brown and White
Half would be orange, half would be white
2 Brown: 2 Brown and White: 0 White
1 Brown: 2 Brown and White: 1 White
A calico cat expresses the orange allele and black allele equally, having areas of fur with either orange or black pigment. What kind of inheritance pattern is this?
Incomplete Dominance
Codominance
Polygenic
Multiple alleles
What inheritance pattern is demonstrated in this image?
Codominance
Incomplete Dominance
Simple Dominance
Epistasis
True or False: Males always inherit their X chromosome from their mother
True
False
If a woman is a carrier for an X-linked recessive trait of hemophilia and her husband has hemophilia, which of the following is true?
All sons will have hemophilia but daughters would not have hemophilia
all daughters will have hemophilia
50% of daughters and 50% of sons could have hemophilia
100% of sons could have hemophilia and 100% of daughters could be carriers
A single gene has 3 or more alternative forms. These are called
heterozygotes
multiple alleles
epistatic
polygenic
Which genotype represents a female who is a carrier for hemophilia?
Which genotype represents a male with hemophilia?
