DNA/RNA & Punnett Squares

In Mendelian inheritance, what term describes a trait that is expressed even in the presence of a recessive allele?

• Recessive trait
• Dominant trait
• Codominant trait
• Incomplete dominance

If both parents are heterozygous for brown eyes (Bb), what percentage of their offspring will likely have brown eyes?

• 25%
• 50%
• 75%
• 100%

What is the term for having two different alleles for a particular gene?

• Homozygous dominant
• Homozygous recessive
• Heterozygous
• Hemizygous

In a Punnett square cross between TT and tt, what percentage of offspring will be heterozygous?

• 0%
• 50%
• 75%
• 100%

Which type of RNA carries the genetic code from DNA to the ribosomes?

• tRNA
• rRNA
• mRNA
• snRNA

What is the genotype of an organism that has two identical recessive alleles?

• Heterozygous
• Hybrid
• Homozygous dominant
• Homozygous recessive

How does DNA differ from RNA in terms of sugar content?

• DNA contains ribose, RNA contains deoxyribose
• DNA contains deoxyribose, RNA contains ribose
• Both contain the same sugar
• Neither contains sugar

In a cross between Rr and rr, what proportion of offspring will have the recessive phenotype?

• 0%
• 25%
• 50%
• 75%

Which type of RNA brings amino acids to the ribosome during protein synthesis?

• mRNA
• tRNA
• rRNA
• snRNA

What is the phenotype ratio in a monohybrid cross between two heterozygous parents?

• 1:2:1
• 3:1
• 1:1
• 9:3:3:1