Biology

A vibrant visual representation of DNA strands with colorful genetic symbols and concepts, highlighting genes and molecular structures in an educational style.

Explore the World of Genetics

Test your knowledge of biology with this engaging quiz that covers essential concepts in genetics, molecular biology, and heredity. Challenge yourself and see how well you understand the mechanisms of life!

11 multiple choice questions
Covers topics like DNA structure, genetic traits, and enzyme functions
Perfect for students, educators, and biology enthusiasts

11 Questions3 MinutesCreated by DiscoverLife101

The backbone of DNA consists of?

Nitrogenous base

A repeating sugar-phosphate-sugar-phosphate pattern

A repeating sugar-nucleotide-sugar-nucleotide pattern

Paired nucleotides

After replication, ________.

Each new DNA double helix consists of two old strands

Each new DNA double helix consists of one old strand and one new strand

Each new DNA double helix consists of two new strands

One new DNA double helix consists of two old strands and the other new DNA double helix consists of two new strands

The expressed (coding) regions of eukaryotic genes are called ________.

Exons

Introns

Promoters

Caps

The CORRECT sequence of events occurring during transcription is ________.

Tailing, capping, splicing

Elongation, initiation, termination

Splicing, capping, tailing

Initiation, elongation, termination

During translation, what is the CORRECT order of events that occur as an amino acid is added?

Peptide bond formation, translocation, codon recognition

Translocation, codon recognition, termination

Codon recognition, peptide bond formation, translocation

Initiation, codon recognition, termination

HIV (human immunodeficiency virus) must use its own ________ to reproduce.

RNA polymerase

TRNA

Reverse transcriptase

DNA polymerase

A purebred plant that produces yellow seeds is crossed with a purebred plant that produces green seeds. The seeds of all of the offspring are yellow. Why?

The yellow allele is dominant to the green allele.

The alleles are codominant.

All of the offspring are homozygous yellow.

The yellow allele is recessive to the green allele.

Attached earlobes are recessive to free earlobes. What genotypic ratio is expected when an individual with attached earlobes mates with an individual heterozygous for free earlobes?

2:1

1:2

3:1

1:1

An individual with the genotype AaBb produces four different gametes in equal proportions. This is a demonstration of ________.

Linkage

Mendel's principle of segregation

The chromosomal theory of inheritance

Mendel's law of independent assortment

What is the key to the recognition of codominance?

The phenotype of the heterozygote is intermediate between the phenotypes of the homozygotes.

The heterozygote expresses the phenotype of both homozygotes

The alleles affect more than one trait.

The trait exhibits a continuous distribution

An individual with (naturally) curly hair and an individual with (naturally) straight hair mate; all of their offspring have (naturally) wavy hair. If an individual with wavy hair mates with an individual with straight hair, what is the probability that their child will have curly hair?

25%

50%

100%

Biology

Explore the World of Genetics

More Quizzes