If you are currently enrolled in IB Biology (SL or HL), you have likely already realized that is not just another unit—it is the structural spine of the entire course. From Mendel’s pea plants to CRISPR-Cas9, genetics accounts for nearly 25% of the final exam questions when combined with the "Human Physiology" genetics links.
Are you looking for a specific IB Biology Genetics Question Bank for SL or HL? Let us know in the comments which subtopic (Linkage? Chi-squared? Transcription?) is giving you the most trouble, and we will send you a free 50-question drill pack.
To determine if an organism with a dominant phenotype is homozygous ( cap A cap A ) or heterozygous ( ), you perform a test cross with a homozygous recessive individual ( 1. Set up the Punnett Grid For a heterozygous parent ( ) crossed with a recessive parent ( 2. Analyze the Ratio The resulting genotypic ratio is 1 The phenotypic ratio is 50% dominant : 50% recessive. Final Answer Ib Biology Genetics Question Bank
Avoid "generic" genetics question banks from A-Level or AP Biology. The IB asks for a global context (e.g., "Discuss the ethical implications of GMOs in developing nations"), which is absent in other curricula.
Genetics is the "math" of biology. It requires logic and precision rather than just rote memorization. By consistently working through an , you familiarize yourself with the IBO’s logic, ensuring that there are no surprises on exam day. If you are currently enrolled in IB Biology
In cats, the gene for fur length has two alleles: long (L) and short (l). Short fur is dominant. A cross between a heterozygous short-furred cat and a long-furred cat produces four kittens. (a) State the genotype of the long-furred parent. [1] (b) Predict the phenotypic ratio of the offspring. [1] (c) If the litter actually contains 3 short-furred and 1 long-furred kitten, explain whether this fits your prediction. [2]
Genetics and evolution (HL) - IB Questionbank - Revision Dojo Let us know in the comments which subtopic (Linkage
By the end of this month, you should be able to open a random genetics question and whisper, "I’ve seen this exact format before." That is the confidence of a 7.
: Solving crosses for codominance (e.g., palomino horses ), sex-linked traits like hemophilia or color blindness, and multiple alleles.
To maximize your score, focus your practice on these core areas found in Topic 3 and Topic 10. 1. Meiosis and Variation