ABO blood groups in humans are controlled by the gene I

⇦

⇨

ABO blood groups in humans are controlled by the gene I. It has three alleles – Iᴬ Iᴮ and i. Since there are three different alleles, six different genotypes are possible. How many phenotypes can occur?

Options

(a) Three
(b) One
(c) Four
(d) Two

Correct Answer:

Four

Explanation:

The three calle/es in ABO blood groups in humans can produce six different genotypes and four different phenotypes.

Genotypes        Phenotypes

Iᴬ Iᴬ, Iᴬ i               Blood group A

Iᴮ Iᴮ , Iᴮ i               Blood group B

Iᴬ Iᴮ                        Blood group AB

i i                             Blood group O

Related Questions:

1. Number of (approximately) genes in E. coil are
2. Ubisch bodies are present in
3. How many ribs are present in human beings
4. Inner lining of the kidney has
5. The spines present in water chestnut are the modification of persistent

Topics: Human Physiology Systems (35)
Subject: Biology (4253)

---

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

---

Share this page with your friends