Exploring Basic Mendelian Genetics and Punnett Squares

Who is recognized as the pioneer of genetics, known for deducing that genes are inherited in pairs?

• Charles Darwin

• Albert Einstein

• Isaac Newton

• Gregor Mendel

What type of plants did Mendel use for his genetic experiments?

• Pea plants

• Rose plants

• Tomato plants

• Sunflower plants

What does a homozygous genotype consist of?

• Two different alleles

• Two identical alleles

• Multiple alleles

• No alleles

Which law of Mendel explains that alleles for different traits are distributed to sex cells (& gametes) independently?

• Law of Segregation

• Law of Independent Assortment

• Law of Dominance

• Law of Uniformity

In a Punnett square, what does a heterozygous genotype look like?

• aa

• Aa

• AAA

• AA

If an organism is homozygous recessive for a trait, what would be its genotype using the letter 'a'?

• aaa

• aa

• Aa

• AA

What phenotype would you expect from a genotype 'Aa' if 'A' is dominant over 'a'?

• Expresses the dominant trait

• Expresses the recessive trait

• Expresses both traits equally

• Does not express any trait

What is the probability of offspring being homozygous dominant (AA) when two heterozygous (Aa) parents mate?

• 25%

• 50%

• 75%

• 100%

Which genotype represents a heterozygous condition?

• Bbb

• bb

• Bb

• BB

What are the possible genotypes for a phenotype that shows a dominant trait?

• Homozygous dominant or heterozygous

• Homozygous recessive

• Heterozygous only

• None of the above