An example of homozygous recessive phenotype would be a red-flowered pea plant. The white-flowered pea plant expresses the dominant phenotype.Continue Reading
Organisms carry both dominant and recessive alleles of a gene. Such organisms would be called carriers of a recessive allele. In this instance, the organism would only show the dominant phenotype of the gene. Cystic fibrosis is another homozygous recessive phenotype. Other diseases, such as Huntington's, are also expressed through the recessive phenotype. However, individuals with Huntington's have either a mutant-mutant expression or a normal-mutant one.
Homozygous means that the organism contains two copies of the same allele for a particular gene. Homozygous recessive means that the organism carries two recessive alleles. Such as with the example above, the white-flowered pea plant has two white alleles to make it be expressed that way. Carriers of the recessive gene are considered to be heterozygous, meaning they have only one allele of each of the dominant and recessive alleles. Huntington's disease is considered to be autosomal dominant, so an individual with this disease could either have a heterozygous gene or a homozygous dominant one. The genotype is the combination of alleles for a certain gene. The genotypes provide the framework for the phenotype that will be expressed.Learn more about Biology
An example of biological evolution is the evolution of the tiger, during which time the tiger's ancestors grew in size due to an abundance of larger prey animals. This led to the large size and musculature, as well as the stripe adaptations to more easily blend into their specific hunting ground.Full Answer >
An example of an endothermic animal would be a dog and an ectothermic animal would be a snake. Endothermic animals must generate their own heat to stay warm and ectothermic animals can warm up using outside sources like the sun.Full Answer >
In a general sense, every distinct species on earth is an example of macroevolution. Each species is distinct from every other species in the world, yet it shares a common ancestry with all other forms of life. Macroevolution is the process by which humans diverged from apes, apes from other mammals, mammals from reptiles and air-breathing vertebrates from fish.Full Answer >
An example of convergent evolution is the similar overall body structure of sharks and dolphins. The shark is a fish while the dolphin is a mammal, but their bodies have evolved to become similar. Another example is the adaptations for gliding found in both sugar gliders and flying squirrels.Full Answer >