Biology Quiz

In a population of dragons, the allele for fire-breathing (F) is dominant over the allele for non-fire-breathing (f). If a homozygous dominant dragon is crossed with a heterozygous dragon, what is the probability that their offspring will be fire-breathing?

• 25%

• 50%

• 75%

• 100%

Which of the following is a characteristic of Turner syndrome?

• Presence of an extra X chromosome in males

• Monosomy of the X chromosome in females

• Trisomy of chromosome 18

• Trisomy of chromosome 13

Which of the following processes results in genetic variation during meiosis?

• Binary fission

• Crossing over

• DNA replication

• Cytokinesis

In a population of rabbits, the allele for long ears (L) is dominant over the allele for short ears (l). If two heterozygous rabbits are crossed, what is the probability that their offspring will have long ears?

• 25%

• 50%

• 75%

• 100%

Which of the following is a characteristic of Klinefelter syndrome?

• Presence of an extra X chromosome in males

• Monosomy of the X chromosome in females

• Trisomy of chromosome 21

• Trisomy of chromosome 13

Which of the following processes is responsible for the separation of homologous chromosomes during meiosis?

• Prophase

• Metaphase

• Anaphase I

• Telophase

What is the primary function of ribosomes in a cell?

• To synthesize proteins

• To store genetic information

• To produce energy

• To transport molecules

Which of the following is a result of nondisjunction during meiosis?

• Normal chromosome number

• Trisomy or monosomy

• Crossing over

• Independent assortment

What is the role of the centromere in cell division?

• To replicate DNA

• To hold sister chromatids together

• To initiate cytokinesis

• To dissolve the nuclear membrane

In a population of unicorns, the allele for a golden horn (G) is dominant over the allele for a silver horn (g). If a homozygous recessive unicorn is crossed with a heterozygous unicorn, what is the probability that their offspring will have a golden horn?

• 25%

• 50%

• 75%

• 100%