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Is it true that all genes show simple patterns of dominant and recessive allleles?
Wiki User
∙ 8y ago
No, it is not true that all genes show simple patterns of dominant and recessive alleles. When Mendel did his studies on peas, he was lucky in that the genes he worked with showed those patterns. Many genes are much more complex and often involve more than one gene. Many genes show intermediate expressions between dominant and recessive.
Wiki User
∙ 8y ago
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What are the names of the genotypes?
Homozygous dominant (Ex:AA) Heterozygous (Ex:Aa) Homozygous recessive (Ex:aa)
Is the following sentence true or false all genes show simple patterns of dominant and recessive alleles?
False. Blood type genes have two dominant alleles (A and B), and one recessive (O). When a person gets one A allele and one B allele, they then have the blood type AB. Both are expressed equally. In other genes, a dominant allele might not be completely dominant, allowing the recessive allele to be partially expressed.
What is crossing a homozygous dominant or homozygous recessive with a heterozygous?
There is a 50% chance of a homozygous dominant and a 50% chance of a heterozygous.
What is the result when a dominant allele pairs up with a recessive allele in a simple dominance?
The dominant form of the trait shows. -Gradpoint
Using the terms dominant recessive explain the difference between genotype and phenotype?
No, I think you have your terms confused.The terms "dominant" and "recessive" are applied to alleles of a genotype. A genotype is an expression (using upper- and lower-case letters) that shows what alleles an organism has for a particular locus. The two alleles (in most cases) inherited (one from mother and one from father) can either be dominant or recessive. The recessive allele is not fully expressed in the presence of the dominant allele and is only expressed when there are two recessive alleles. The genotype could be called "recessive" I suppose if the genotype is homozygous recessive. But remember that two recessive alleles as a genotype is only one possibility - in which case you can't say the "genotype is recessive".The phenotype is dependent on the genotype. If present, the dominant alleles (in simple Mendelian genetics) will determine the phenotype - what the organism's trait or characteristic is. The phenotype will never be what is coded by the recessive allele unless the genotype is two recessive alleles.
In one allele is dominant to a recessive allele?
In _____, one allele is dominant to a recessive allele.
What are the names of the genotypes?
Homozygous dominant (Ex:AA) Heterozygous (Ex:Aa) Homozygous recessive (Ex:aa)
Is the following sentence true or false all genes show simple patterns of dominant and recessive alleles?
False. Blood type genes have two dominant alleles (A and B), and one recessive (O). When a person gets one A allele and one B allele, they then have the blood type AB. Both are expressed equally. In other genes, a dominant allele might not be completely dominant, allowing the recessive allele to be partially expressed.
What is crossing a homozygous dominant or homozygous recessive with a heterozygous?
There is a 50% chance of a homozygous dominant and a 50% chance of a heterozygous.
What is the opposite of homozygous of dominant?
heterozygous recessive
Is pancreatic cancer recessive or dominant?
Pancreatic cancer is not caused by a single gene mutation that follows typical dominant or recessive inheritance patterns. Instead, it is usually the result of multiple genetic and environmental factors interacting over time. Some inherited genetic mutations, such as those in the BRCA1 and BRCA2 genes, can increase the risk of pancreatic cancer, but they do not follow a simple dominant or recessive pattern.
What is the result when a dominant allele pairs up with a recessive allele in a simple dominance?
The dominant form of the trait shows. -Gradpoint
What is the result when a dominant allele pairs up with a recessive allele in simple dominance?
The dominant form of the trait shows. -Gradpoint
What was the ratio of dominant of recessive phenotypes in the F2 generation of Mendel's experiments?
The traits were recessive.
A single gene trait that has two alleles and that shows a simple dominant recessive pattern will result in?
A 3:1 phenotypic ratio (Mendelian inheritance).
Organisms that are homozygous dominant and those that are for a trait controlled by simple dominance have the same phenotype?
Because the dominant gene always appears in the phenotype, whether or not it is "pure" (homozygous) or "mixed" (heterozygous). The recessive gene does what it says: it is recessive to the dominant gene. So, if it comes between the two, the dominant always appears. Of course, this only happens in your average Dominant-Recessive traits.
Using the terms dominant recessive explain the difference between genotype and phenotype?
No, I think you have your terms confused.The terms "dominant" and "recessive" are applied to alleles of a genotype. A genotype is an expression (using upper- and lower-case letters) that shows what alleles an organism has for a particular locus. The two alleles (in most cases) inherited (one from mother and one from father) can either be dominant or recessive. The recessive allele is not fully expressed in the presence of the dominant allele and is only expressed when there are two recessive alleles. The genotype could be called "recessive" I suppose if the genotype is homozygous recessive. But remember that two recessive alleles as a genotype is only one possibility - in which case you can't say the "genotype is recessive".The phenotype is dependent on the genotype. If present, the dominant alleles (in simple Mendelian genetics) will determine the phenotype - what the organism's trait or characteristic is. The phenotype will never be what is coded by the recessive allele unless the genotype is two recessive alleles.
