Heredity refers to the passing of characteristics from parents to offspring. Genetics is the study of heredity, genes and variations in organisms. Heredity occurs in plants, animals, bacteria and fungi.Know More
Organisms inherit physical characteristics or traits from their parents or ancestors. This is the reason offspring often resemble their parents. Cells of living organisms contain tiny biochemical structures called genes. The genes are responsible for carrying traits from one generation to the next. Genes get shuffled during reproduction, resulting in offspring with varying characteristics. Some traits are the result of the interaction of several genes. Genes are made up of a chemical called DNA, or deoxyribonucleic acid, which is strung together in long chains called chromosomes.
Gregor Mendel is considered the father of genetics. He studied the nature of inheritance in pea plants. In his experiments, he discovered that the color of the flowers were either purple or white and not a mixture of the two colors. He observed that pea plants inherit traits through units of inheritance. These units of inheritance were later named genes.
Some diseases, such as sickle-cell anemia, are genetic. A small difference in DNA can result in sickle-cell anemia. The environment also influences the expression of a gene. A person may be genetically predisposed to obesity, but the actual weight of the person depends on diet and lifestyle.Learn more about Molecular Biology & DNA
A homozygote is an individual organism with two copies of the same allele that determines a specific trait, while a heterozygote has a copy of two different alleles for the same trait. Alleles are alternative forms of genes that determine the same trait.Full Answer >
A double recessive gene contains recessive alleles inherited from both parents. Alleles are variations of a gene controlling a particular characteristic such as eye color. The presence of both recessive alleles results in the expression of the recessive trait.Full Answer >
The difference between myosin and actin is that, where myosin uses cellular energy to move along the actin, the actin is the passive partner in the process. Myosin and actin are the protein types responsible for muscle movement, as well as movement in many other types of cells. Because they have such a widespread role, myosin and actin are crucial proteins for many forms of life.Full Answer >
Heredity factors influence what an organism develops into because of genetic influences, whereas the environment plays a role in determining what the organism becomes. One example of this is height, which is partially determined by the person's genes, but is also determined by dietary differences.Full Answer >