Biology 30 Genetics Practice Test
$69.00
Unlock the full practice quiz
Get complete access to the questions, explanations and printable quiz resources.
Full access: unlock all quiz questions and explanations.
Printable review: access the full quiz PDF with correct answers after purchase.
About this Exam
Prepare with the Biology 30 Genetics Practice Test practice quiz. This question bank includes 10 questions covering term, cell, describes, organism, and aabb. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.
Sample Questions
Question
1
Which term refers to a body cell, or non-sex cell?
Explanation:
Distinguishing body (non-sex) cells from reproductive cells. A body cell is called a somatic cell. These cells make up tissues and organs and divide by mitosis to grow and repair the organism. They are typically diploid, carrying two sets of chromosomes, and are not used to form gametes. Germ cells, on the other hand, are the cells that give rise to gametes and are part of the reproductive lineage. Gametes themselves are the sex cells (sperm or egg) and are haploid. Stem cells are undifferentiated cells that can become various cell types, but the term somatic specifically refers to the non-reproductive body cells, which is what the question is asking about.
Question
2
Which term describes a picture of an organism's genome used for chromosomal analysis?
Explanation:
In chromosomal analysis, the organized image of all chromosomes from a cell is called a karyotype. A karyotype shows the number and appearance of chromosomes, typically arranged in pairs by size and banding pattern, and is prepared from cells arrested in metaphase and stained to reveal characteristic bands. This visual snapshot allows scientists to detect abnormalities such as extra or missing chromosomes, translocations, or structural changes. The other terms don’t fit as well: a genome refers to the entire set of genetic material, not a single chromosomal image; chromosome count is just the total number of chromosomes and doesn’t capture their size or structure; and a nucleoid image describes bacterial DNA organization, not the eukaryotic chromosome arrangement used in standard chromosomal analysis.
Question
3
In a dihybrid cross AaBb x AaBb, classic phenotypic ratio?
Explanation:
Two genes with independent assortment and complete dominance produce a dihybrid phenotypic pattern. For each gene, Aa x Aa gives a 3:1 phenotypic split (dominant to recessive). Because the two genes assort independently, multiply the probabilities for combined phenotypes. - Dominant for both traits: 3/4 × 3/4 = 9/16 - Dominant for one trait, recessive for the other: 3/4 × 1/4 = 3/16 (two such cases) - Recessive for both traits: 1/4 × 1/4 = 1/16 Putting these together gives a 9:3:3:1 phenotypic ratio. This is the classic result for a dihybrid cross under independent assortment and complete dominance.
Question
4
What is the term for a mutation that involves the loss of all or part of a chromosome?
Explanation:
Loss of genetic material from a chromosome is called a deletion. This mutation means all or part of the chromosome is missing, so fewer genes are present in that region. Deletions can occur at the end of a chromosome (terminal) or within the chromosome (interstitial), and they can have significant effects depending on which genes are lost. In contrast, duplications add extra copies of a chromosome segment, inversions flip a segment's order without removing material, and translocations move a segment to a different chromosome or location. A classic example of a deletion-related condition is Cri du chat, caused by a missing piece of chromosome 5.
Question
5
What is incomplete dominance? Give the genotype-phenotype example.
Explanation:
Incomplete dominance is when the heterozygous genotype produces a phenotype that is intermediate between the two homozygous phenotypes because neither allele fully masks the other. An example uses color: red is produced by one allele, white by the other, so RR plants are red, rr plants are white, and Rr plants are pink. This shows a blending effect where the heterozygote sits between the two extremes. This differs from complete dominance, where the heterozygote looks like one of the homozygotes, and from codominance, where the heterozygote displays both traits at once (as with AB blood type having both A and B antigens).
Ready to test your knowledge?
Buy Now to AccessAdditional Information
Biology 30 Genetics Practice Test
This practice set contains 10 questions from the matching question bank and focuses on term, cell, describes, organism, and aabb. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.
This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.
Frequently Asked Questions
This quiz contains a total of 10 practice questions carefully selected to test your knowledge on this subject.
Yes, you will have exactly 0 minutes to complete the exam. A countdown timer will be visible once you start.
Yes, you can retake this practice test as many times as you need. The questions and options may be randomized on subsequent attempts to ensure comprehensive learning.
Reviews
5.0
Based on 0 reviews
Leave a Review
No reviews yet. Be the first to review!