Non-Mendelian Inheritance
Biology ⇒ Genetics and Heredity
Non-Mendelian Inheritance starts at 10 and continues till grade 12.
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See sample questions for grade 11
A cross between a red-flowered and a white-flowered snapdragon produces all pink-flowered offspring. What type of inheritance is this?
A cross between two pink snapdragons (incomplete dominance) produces offspring in what phenotypic ratio?
A man with type AB blood and a woman with type O blood have children. What are the possible blood types of their children?
A woman with type AB blood and a man with type AB blood have a child. What is the probability that the child will have type O blood?
Describe how mitochondrial DNA is inherited in humans.
Describe the concept of gene interaction and give an example.
Describe the difference between polygenic inheritance and multiple alleles.
Explain how epistasis can affect the expected phenotypic ratios in a dihybrid cross.
Explain the difference between incomplete dominance and codominance.
Explain why mitochondrial diseases are inherited only from the mother.
Explain why the inheritance of leaf color in some plants is considered cytoplasmic inheritance.
Explain why the inheritance of skin color in humans is considered polygenic.
What is the term for a gene that can mask the expression of another gene at a different locus?
Which inheritance pattern is shown when a single gene affects multiple traits?
Which organelle is responsible for maternal inheritance in humans?
A gene for coat color in mice has two alleles: A (agouti) and a (black). Another gene, C, is required for pigment production, with C (color) dominant to c (albino, no pigment). If a cross is made between AaCc and AaCc mice, what is the expected phenotypic ratio of agouti:black:albino offspring?
A plant species shows variegated leaves due to the presence of both normal and mutant chloroplasts in its cells. If a variegated female plant is crossed with a green male plant, what will be the expected phenotype of the offspring? Explain your answer.
A woman who is heteroplasmic for a mitochondrial disorder marries a man with normal mitochondria. Explain the possible outcomes for their children and why the inheritance pattern is considered non-Mendelian.
Describe the phenomenon of anticipation in the context of trinucleotide repeat disorders and explain why it is considered a non-Mendelian inheritance pattern.
Explain how environmental factors can influence the expression of polygenic traits, using human skin color as an example.
