Category 02- Practice Questions

Front

What is a karyotype?

Back

A karyotype is a visual representation of an individual's chromosomes, used to assess genetic disorders.

Front

What role does colchicine play in cell division?

Back

Colchicine prevents spindle fibers from forming, halting mitotic division during metaphase.

Front

What happens if spindle fibers do not form during mitosis?

Back

Mitotic division stops in metaphase and cannot proceed to anaphase.

Front

What is the probability of offspring having cloven hooves if both parents are heterozygous (Hh)?

Back

75% of the offspring will have cloven hooves.

Front

What type of genetic mutation is a substitution?

Back

A substitution mutation occurs when one nucleotide is replaced by another in the DNA sequence.

Front

What is a nucleotide?

Back

A nucleotide is the basic building block of DNA and RNA, consisting of a sugar, a phosphate group, and a nitrogenous base.

Front

What is the function of hydrogen bonds in DNA?

Back

Hydrogen bonds hold the two strands of DNA together by connecting complementary nitrogenous bases.

Front

What is the genetic basis of coat-color variation in Texas Longhorn cattle?

Back

Differences in the nucleotide sequences of genes determine coat-color variation.

Front

What is the difference between dominant and recessive alleles?

Back

A dominant allele expresses its trait even in the presence of a recessive allele, while a recessive allele only expresses its trait when paired with another recessive allele.

Front

What is the significance of the S phase in the cell cycle?

Back

The S phase is when DNA replication occurs, resulting in two identical sets of chromosomes.