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Jul 8, 2009 · This chapter provides fundamental information about basic genetics concepts, including cell structure, the molecular and biochemical basis of disease, major types of genetic disease, laws of inheritance, and the impact of genetic variation.
- 2009/07/08
Dec 20, 2023 · Genetic inheritance refers to the passing of traits from one generation to the next through chromosomes, which carry the genetic information in the form of DNA. Genes, located on chromosomes, play a crucial role in determining traits and characteristics.
Cells share many common features, yet they can look wildly different. In fact, cells have adapted over billions of years to a wide array of environments and functional roles. Nerve cells, for...
- How Are Traits determined?
- How Are Traits Inherited?
- Dominant Traits vs. Recessive Traits
- Other Examples of Weird Inherited Traits
- Sources
Traits are determined by an individual's genotype, the summation of the genes in our DNA. A gene is a portion of a chromosome. A chromosome is composed of DNA and contains the genetic material for an organism. Humans have twenty-three pairs of chromosomes. Twenty-two of the pairs are called autosomes. Autosomes are typically very similar in males a...
How are traits passed from one generation to the next? This happens when gametes unite. When an egg is fertilized by a sperm, for each chromosome pair, we receive one chromosomefrom our father and one from our mother. For a particular trait, we receive what is known as an allelefrom our father and one allele from our mother. An allele is a differen...
When alleles are expressed via simple dominant versus recessive traits, the specific alleles inherited determine how the phenotype is expressed. When an individual has two dominant alleles, the phenotype is the dominant trait. Likewise, when an individual has one dominant allele and one recessive allele, the phenotype is still the dominant trait. W...
A longer second toe and attached earlobes are often cited as examples of a "weird trait" that follows the two dominant/recessive alleles forms of one gene inheritance. Again, however, evidence suggests that both attached earlobe and longer second toe inheritance are quite complex.
“Attached Earlobe: The Myth.” Myths of Human Genetics, udel.edu/~mcdonald/mythearlobe.html.“Observable Human Characteristics.” Nutrition & the Epigenome, learn.genetics.utah.edu/content/basics/observable/.- Regina Bailey
Jul 30, 2022 · Traits like blood type, cleft chin, dimples, and widow’s peaks are all inherited in a fairly straight-forward, simple fashion. However, the inheritance of other traits is much more complex and harder to understand: these traits include height, skin color, and eye color.
Drosophila chromosome. Scientists first discovered chromosomes in the nineteenth century, when they were gazing at cells through light microscopes. But how did they figure out what chromosomes...
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In particular, it was shown that, when a bacterial virus infects a cell, the viral DNA rather than the viral protein must enter the cell in order for the virus to replicate. Moreover, the parental viral DNA (but not the protein) is transmitted to progeny virus particles.
