Question

Mendels principle on heredity

Answer 1

Mendel’s Three Laws of Inheritance Mendel’s research produced three laws of inheritance that are true today. Summary of the Three Laws Law of Dominance (Dominate vs Recessive Alleles) In a cross of parents that are pure for contrasting traits, only one form of the trait will appear in the next generation. All offspring will be hybrid for a trait and will have only the dominant trait express the phenotype. The phenotype trait that is NOT expressed in the hybrid is called recessive. Phenotype for RR is Round. Phenotype for Rr is Round. Phenotype for rr is wrinkled. Because round is the dominant allele over the wrinkled allele, the hybrid, Rr, will express the dominate trait of round. Law of Segregation (regarding ALLELES) During the formation of gametes (eggs or sperm), the two alleles responsible for a particular trait separate from each other. Alleles for a particular trait are then "recombined" at fertilization, producing the genotype for the traits of the offspring. Rr R r Law of Independent Assortment (regarding TRAITS) Alleles for different traits are distributed to sex cells (& offspring) independently of one another. (Example: the trait for height and the trait for color of peas do not depend on each other. These traits are independent of each other and can independently and randomly be distributed into the sperm or egg cells.) (Note: as long as any 2 traits are not on the same chromosomes then they can be distributed randomly and independently from each other into the sex cells.) R – Round T – Tall r – Wrinkled t – Short RrTt RT Rt rT rt

Answer 2

Answer:

Gregor Mendel, through his work on pea plants, discovered the fundamental laws of inheritance. He deduced that genes come in pairs and are inherited as distinct units, one from each parent. Mendel tracked the segregation of parental genes and their appearance in the offspring as dominant or recessive traits.

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