Dominance is when one gene completely takes over the phenotype, and codominance is when two genes are equally expressed. For example: Dominance: Red flower x yellow flower = red flower (red gene is expressed, but yellow gene isn't) Codominance: Red flower x white flower = flower with red petals and white petals (both the red gene and the white gene are expressed)
An example of a heterozygous recessive genotype is when an individual carries one dominant allele and one recessive allele for a particular trait. One example could be a person with the genotype Aa, where "A" represents the dominant allele and "a" represents the recessive allele.
An allele that is masked by the dominant allele is called a recessive allele. When an individual has one dominant allele and one recessive allele, only the trait determined by the dominant allele will be expressed. The recessive allele will only be expressed if an individual has two copies of it (homozygous recessive).
genes can be codominant for example in blood groups a person can be A,B,AB or O. neither A nor B is more or less dominant than each other but they are dominant over O. there are many other types of dominance/recessive relationships in genes. you could look up epistasis on wikipedia to get a better idea of the bigger picture.
No, the dominant allele will be expressed in the individual's phenotype, masking the presence of the recessive allele. The recessive allele will only be expressed if an individual inherits two copies of the recessive allele.
The type of inheritance that involves one dominant allele and one recessive allele is called simple Mendelian inheritance or complete dominance. In this pattern, the phenotype of the organism will display the trait associated with the dominant allele, while the recessive allele's effects are masked when both alleles are present. An example of this is the inheritance of flower color in pea plants, where purple (dominant) flowers mask the expression of white (recessive) flowers.
Dominant Inheritance is when one parent has a dominant gene and the other has a recessive gene. The dominant gene overpowers the recessive gene, and only the dominant gene is phenotypically expressed.Source: http://www.accessexcellence.org/RC/VL/GG/recessive.phpSome examples are variegate porphyria, Huntington's disease and myotonic dystrophy.source: http://genome.wellcome.ac.uk/doc_WTD020849.html
Dominance is when one gene completely takes over the phenotype, and codominance is when two genes are equally expressed. For example: Dominance: Red flower x yellow flower = red flower (red gene is expressed, but yellow gene isn't) Codominance: Red flower x white flower = flower with red petals and white petals (both the red gene and the white gene are expressed)
Hitchhiker's thumb is caused by a dominant allele. Individuals with at least one copy of the dominant allele will exhibit the thumb's characteristic flexibility, while those with two recessive alleles will have a straight thumb. This trait is a classic example of simple Mendelian inheritance.
A dominant gene is always expressed if present, and the recessive gene is only expressed with the homozygous recessive genotype. For example, if the dominant gene is red (represented by the letter R) and the recessive gene is white (represented by the letter r), then a homozygous dominant organism's genotype will be RR, and its phenotype will be red. If the organism is homozygous recessive, then the genotype will be rr and the phenotype will be white. If the organism is heterozygous, then the genotype will be Rr, and the organism will be red.
In genetics, "dominant" refers to an allele that expresses its trait even when only one copy is present, while "recessive" describes an allele that requires two copies to manifest its trait. For example, in a gene where "A" is dominant and "a" is recessive, an individual with either "AA" or "Aa" will display the dominant trait, while only an individual with "aa" will show the recessive trait. This relationship plays a crucial role in inheritance patterns and the expression of traits.
Without specific details about "question 9," I cannot accurately determine the types of inheritance being referenced. However, common types of inheritance in genetics include autosomal dominant, autosomal recessive, X-linked dominant, and X-linked recessive. Each type has distinct patterns of trait transmission from parents to offspring. If you can provide more context or details, I can give a more tailored response.
Dominant alleles are written in upper case (i.e, 'A'), while recessive alleles are lower case (i.e, 'a')
Dominant when spoken of as a principle usually refers to the characteristics of genes and alleles (different forms of genes). A dominant trait for example would mask the expression of another. For example a brown eyed mother and a blue eyed father will have a brown eyed baby because brown is dominant and masks the fathers blue eyed gene.
Dwarfism is a dominant trait in humans.
No, it is an example of sex-linked recessive inheritance.
An example of a heterozygous recessive genotype is when an individual carries one dominant allele and one recessive allele for a particular trait. One example could be a person with the genotype Aa, where "A" represents the dominant allele and "a" represents the recessive allele.