Introduction to Genetic Diagrams for Single Gene Inheritance

What is the term used to describe the inheritance of a single gene?

• Polygenic inheritance

• Monohybrid inheritance

• Dihybrid inheritance

• Epistatic inheritance

In the example of superpowers, which allele is dominant?

• Little s

• Neither is dominant

• Big S

• Both are dominant

What is the expected phenotype of offspring from two homozygous parents, one with normal strength and one with super strength?

• Three with normal strength, one with super strength

• All offspring with normal strength

• All offspring with super strength

• Half with super strength, half with normal strength

When two heterozygous individuals have a child, what is the expected ratio of normal strength to super strength offspring?

• 4:0

• 2:2

• 3:1

• 1:1

What tool can be used to predict the characteristics of offspring from genetic crosses?

• Family tree

• Punnett square

• Genetic map

• Chromosome chart

What is the probability of two heterozygous parents having a child with super strength?

• 1 in 2

• 1 in 5

• 1 in 3

• 1 in 4

How can probabilities be expressed?

• Only as decimals

• Only as percentages

• As fractions, decimals, or percentages

• Only as fractions

What does a filled shape represent in a pedigree chart?

• Unknown genotype

• Carrier of super strength

• Super strength

• Normal strength

In a pedigree chart, what does a half-filled shape indicate?

• Carrier of super strength

• Super strength

• Normal strength

• Unknown genotype

What can family trees or pedigree charts help us understand?

• The dietary habits of a family

• The geographical origin of a family

• The inheritance patterns of traits

• The age of family members