Mendelian inheritance

Deoxyribonucleic acid is known as the molecule of inheritance where its structure dictates its function in storing the genetic information of the organism (Rafael, 2010). This molecule contains genes which encode proteins needed for the complex biochemical metabolic reactions which occur within the organism (Rafael, 2010). The DNA molecule consists of 2 complementary strands in a helical structure where each strand serves as an informational template for the offspring during duplication (Rafael,…

melanogaster); we had the opportunity to learn more of how to distinguish between the male and female drosophila; one way that helps me was to look for the sex comb and the size. The purpose of this experiment was to learn more and be able to understand the Mendelian Genetics. We did an actual cross of fruit fly (drosophila melanogaster) such as the monohybrid, dihybrid, X-linked A, X-linked B and three points cross. Finally, we learned how the phenotype is passes from the parent of fruit fly…

We do not have enough information to call it an Autosomal/Sex-Linked inheritance pattern. 75% are type C so it is dominant. _____________________________________________________________________________________ Using this hypothesis, predict your expected F2 Generation results. Show a Punnett square of the cross and determine…

Lethal alleles can be recessive, dominant or conditional depending on the genes involved. Examples of the mutations caused by the lethal alleles are cystic fibrosis and sickle cell anaemia. Incomplete dominance Incomplete dominance is a part of inheritance, when one allele for a precise trait isn’t completely expressed above its paired allele, in which the expressed physical trait is a mixture of the phenotypes in both alleles. Examples of incomplete dominance include plants normally…

a complex field of study that has rapidly expanded within the last three decades as DNA technology has advanced, allowing scientists to explain hereditary traits that could not be elucidated by Mendel’s laws. Through extensive study of non-Mendelian inheritance, epigenesists developed a number of mechanisms for the alteration of gene expression that occurred outside of the actual DNA sequence. In addition, changes in the epigenetic expression of DNA have lead scientists to believe diseases, such…

Eukaryotic organism such as drosophila have been used extensively to demonstrate the classical Mendelian laws because they are inexpensive and abundant in genetic variations due to a small number of chromosomes. The purpose of this lab was to determine the phenotypic ratio for monohybrid and dihybrid crosses using drosophila. In a monohybrid cross, a single trait (eye color) is crossed in the organism and in a dihybrid cross,two different traits (eye color and wings) are crossed for a…

asecondary goal in conductingathis lab was to study and comprehend mendelian genetics. In this experiment, Drosophilaamelanogaster, commonlyaknown as fruit flies, were used to studyaand understand the principles of mendelianagenetics. D. melanogasterawas also used as a model to identifyathe patterns of inheritance of certainamutant traits in fruit flies. Mendel’salaw ofasegregation is important in understandingagenetic inheritance. It statesathat each pair of homologousatrait carrying particles…

one to six nucleotides that are interspersed throughout the genome. Microsatellite also known as simple sequence repeats (SSRs) or simple sequence length polymorphism (SSLPs) (Dhar et al., 1988). SSRs are inherently unstable and are inherited in a Mendelian manner (Jarne and Lagoda, 1996). They are highly abundant in eukaryotes, prokaryotes and even small bacterial genomes. SSRs can be found anywhere in the genome both in coding and non-coding region and may be arise through an error in the…

Father of modern genetics, Gregor Mendel, is well known for his garden pea plant experiment in which he discovered the phenomenon of “dominant” and “recessive” traits (Orel, 1996). His experiments led him to what is known as today’s Mendel’s Laws of Inheritance: Law of Segregation, Law of Independent Assortment, and Law of Dominance (Orel, 1996). The Law of Segregation states two alleles for a heritable character separate from each other during gamete formation and end up in different gametes…

evolutionary thought. Today, the evolutionary theory combines the “original” Modern Synthesis with an understanding of DNA along with cellular chemistry. The following three subjects are very critical to be able to understand evolution: natural selection, Mendelian genetics, and DNA. The modern evolutionary synthesis explains how the discoveries of Gregor Mendel go hand in hand with that of Charles Darwin. The discovery of evolutionary principles first took place in western Europe. The…