Answered: Draw a Punnett Square for two…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Draw a Punnett Square for two heterozygotes; what is the probability of each possible genotype?

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Step 1: Explaining zygosity

An organism that is diploid such as a human has 2 sets of chromosomes. Furthermore on these chromosomes there are genes so for any given genes there are 2 copies of the same gene one inherited from father and one inherited from the mother. These copies of same genes are called alleles of the gene. Zygosity is the degree of similarity of alleles in an organism. Usually there are 2 types of alleles in a gene. Dominant and recessive. If both the alleles are dominant or both are recessive then the organism is said to be homozygous for the trait/gene. But if one allele is dominant and other is recessive then the condition is known as heterozygous. It is represented using one uppercase and one lowercase letter (Aa)

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