
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Mendel's Laws of Inheritance
Menders Success
Menders approach to the study of heredity was effective for several reasons. Foremost was his choice of experimental subject, the pea plant Pisum sativum.
Monohybrid Crosses
Mendel began by studying monohybrid crosses— those between parents that differed in a single characteristic.
The principle of segregation (Mendel's first law) states that each individual diploid organism possesses two alleles for any particular characteristic. These two alleles segregate (separate) when gametes are formed, and one allele goes into each gamete. Furthermore, the two alleles segregate into gametes in equal proportions.The concept of dominance that, when two different alleles are present in a genotype, only the trait of the dominant allele is observed in the phenotype .
Multiple-Loci Crosses
Dihybrid Crosses In addition to his work on monohybrid crosses, Mendel also crossed varieties of peas that differed in two characteristics (dihybrid crosses).
The Principle of Independent Assortment
The principle of independent assortment (Mendel's second law). This principle states that alleles at different loci separate independently of one another.
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A fter r eading the info above
Explain the Mendel laws of Inheritance.
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