Download Non-Mendelian Practice Quiz

Non-Mendelian Practice Quiz
1.
What is the difference between Mendelian and Non-Mendelian inheritance?
2.
Draw a Punnett square showing the offspring of a cross between a true-breeding red-flowering
plant and a true-breeding white-flowering plant if the inheritance pattern is incomplete dominance.
Describe the phenotypes and percentages (or ratios) of the offspring.
3.
Draw a Punnett square showing the offspring of a cross between a black chicken and a white
chicken if the inheritance pattern is codominance. Describe the phenotypes and percentages (or
ratios of the offspring.
4.
Draw a Punnett square showing the blood type of offspring if the genotype of one parent is AO and
the other parent is BO. Describe the ratios of the offspring genotypes and phenotypes.
5.
What kind of inheritance pattern is described in question 4?
6.
Define polygenic inheritance and provide examples of such traits in humans.
7.
Define what a polyphenic trait is and give an example.
Non-Mendelian Practice Quiz
Answers
1.
Mendelian genetics is a type of biological inheritance that follows the three laws originally proposed by
Gregor Mendel:
The law of segregation,
The law of independent assortment, and
The law of dominance.
These three laws involve traits that are passed down with dominant and recessive alleles from one gene
Non-Mendelian genetics involve any other form of inheritance that Mendel didn’t describe. These
modern discoveries include:
Linked genes with crossing-over events
Sex-linked genes
Incomplete dominance
Codominance
Multiple alleles
Polygenic inheritance
Polyphenic inheritance.
2.
3.
Non-Mendelian Practice Quiz
4.
5.
There are three types of inheritance patterns for the ABO blood type:
1) Complete dominance because the A allele and the B allele are both dominant over
the i allele (no antigen)
2) Codominance because both A and B alleles produce antigens on type AB blood cells.
2) Multiple alleles because there are three alleles for the immunoglobulin (I) gene. The
three alleles are A, B, and i.
6.
Polygenic inheritance is the result of traits that are influenced by two or more genes.
Examples in humans include skin color, hair color, eye color, height, weight, foot size, etc.
7.
Polyphenic traits are those where two or more distinct phenotypes are produced by the
same genotype as a result of environmental conditions. This condition can be passed down
from parent to offspring.
Examples include how temperature affects the fur color of the snowshoe hare, wing
color of the buckeye butterfly, and the incubation of alligator eggs (<30 °C producing all
females and > 34 °C producing all males). Also the feeding of Royal Jelly to bee larvae to
produce queen bees.