Final exam 2023

What you see, or physical appearance

• Genotype
• Homozygous
• Heterozygous
• Phenotype

Which of the following alleles is homozygous (purebred ) recessive

• TT
• bb
• Gg
• rT

A grasshopper has 24 chromosomes in its body cells. How many chromosomes are in each sex cell of a grasshopper (after they have undergone meiosis)?

• 24
• 12
• 48
• 6

Which of the following is a common example of selective breeding?

• Cows that produce lots of meat
• Tomato plants that produce fewer tomatoes
• Crops that catch disease

A chromosome is

• A doubled rod of condensed DNA
• a twisted ladder
• a genome
• an alllele

This karyotype shows that the sex of this individual is:

• Female
• Male

What would the complimentary nitrogen bases for this gene sequence? ATGCGC

• AACGCG
• TACGCG
• TAGGCG
• TACGCC

When crossing an organism that is homozygous recessive with a one that is heterozygous (often referred to as a heterozygote), what is the chance of getting an offspring with the homozygous recessive phenotype?

• 0%
• 25%
• 50%
• 100%

The Punnett square shows the results of a cross between two guinea pigs. Which represents the genotypes of the two parents?

• 
• 
• 
• 

SpongeBob’s mother is so proud of her son and his new wife, SpongeSusie, as they are expecting a littlesponge. She knows that they have a 50% chance of having a little roundpants, but is also hoping the new arrival will be blue (a recessive trait) like SpongeSusie and many members of her family. If SpongeBob is heterozygous for his yellow body color, what are the chances that the baby sponge will be blue? Create a Punnett square to help you answer this question.

• 1 out of 4
• 2 out of 4
• 3 out of 4
• 4 out of 4