Search results
In this example, we will call the gene for cleft chin “B,” and the gene for smooth chin “b.” Cleft chin is a dominant trait, which means that having the dominant allele either from one parent (Bb) or both parents (BB) will always result in the phenotype associated with the dominant allele.
Dec 20, 2023 · Dominant genes have the ability to mask the effects of recessive genes, meaning that when a dominant gene is present, it will be expressed in the phenotype of the organism. In the animal kingdom, there are numerous examples of dominant genes that determine specific traits. One well-known example is the dominant black coat color gene in dogs.
An example of this can be found in the recessive gene disorder sickle cell disease. The gene that produces healthy, round-shaped red blood cells is dominant. The recessive gene causes an abnormality in the shape of red blood cells; they take on a sickle form, which can clog the veins and deprive vital organs of oxygen, increasing the risk of stroke.
Dec 20, 2023 · The dominant gene is typically represented by a capital letter, while the recessive gene is represented by a lowercase letter. For example, let’s consider the trait for eye color. Brown eyes are determined by a dominant gene (B), while blue eyes are determined by a recessive gene (b).
- Abstract and Keywords
- Key Points
- The Structure and Function of DNA: RNA Splicing and Alternative Splicing
- Questions for Future Research
- David S. Moore
When considering how “nature” and “nurture” contribute to development, psychologists often take the former to mean “influenced by genes.” Traditionally, behavioral geneticists have used twin and adoption studies to assess the extent of genetic influence on various behaviors. Recently, the heritability statistics these studies generate have been cri...
In building traits during development, genes operate collaboratively with nongenetic biological factors (many of which are influenced by environmental factors). Therefore, neither biological, psychological, nor pathological characteristics can be accurately labeled “genetic” (i.e., genetically determined); genetic abnormalities do not even straight...
The reason messenger-RNA molecules need to be prepared before being used at the ribosomes is related to the fact that sequences of “junk” nucleotide bases are scattered liberally among potentially meaningful sequences of nucleotide bases in the DNA of all complex organisms; that is, nucleotide bases are scattered liberally among potentially meaning...
What kinds of cells besides neural and blood cells might show epigenetic effects of experience? Do maternal behaviors epigenetically influence stress reactivity in human infants as they do in newborn rats? What specific maternal behaviors are implicated in any such effects in human beings? What are the specific roles immediate early genes play in m...
David S. Moore, Department of Psychology, Pitzer College and Claremont Graduate University, Claremont, CA
- 440KB
- 29
Neither parent's dominant trait can overtake the other parent's dominant trait, and characteristics from both parents merge in the offspring. This results in a new, blended trait (phenotype) with a heterozygous genotype that can then be passed on to future offsprings. An example of incomplete dominance is found in the snapdragon plant.
People also ask
What are some examples of dominant genes?
What if one parent has a dominant trait?
What are dominant and recessive genes?
How do dominant genes affect phenotypes?
What is a dominant gene phenotype?
What determines the dominance of a trait?
Gene locus is specific location of a particular gene on homologous chromosomes. 3. In Mendel’s cross, the parents were true-breeding; each parent had two identical alleles for a trait–they were homozygous, indicating they possess two identical alleles for a trait. a. Homozygous dominant genotypes possess two dominant alleles for a trait. b.
