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Why cant you be certain of the genotype of an organism that shows a recessive trait?
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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.
What is the genotype of a pea plant that shows the recessive phenotype?
Pp
What is the genotype any time a recessive trait shows up?
homozygose negative :D
What can a punnett square tell us?
Punnett squares demonstrate the percentage of traits that are passed on from one generation to the next. It shows the pairings of dominant and recessive genes and what percentage there is of the next generation having those particular traits.
How will you know if your plant is purebred and hybrid?
An organism which shows a dominant trait can be classified as pure breed or hybrid by test crossing it. In test cross, the organism is crossed with a recessive one. If the F1 progeny shows a dominance-recessiveness ratio of 1:1, it means that the organism was a hybrid. If the f1 progeny shows a ratio of 3:1, it means that the organism was a pure breed.
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.
What is the genotype of a pea plant that shows the recessive phenotype?
Pp
What conclusion about your genotype is evident if one of your siblings but neither parent shows the recessive trait?
Both parents had the recessive gene.
When is a recessive allel expressed in offspring?
A recessive phenotype is expressed in an offspring that has a homozygous recessive genotype for that trait.
What is the genotype any time a recessive trait shows up?
homozygose negative :D
Which genotype shows an organism heterozygous for a single genes?
Aa
To determine the genotype of an individual that shows the dominant phenotype you would cross the individual with one that is?
Homozygous recessive.
What is a genotype with one dominant and one recessive gene?
The genotype of a person with one dominate allele for a gene and one recessive would be expressed as Aa or Yy. You can use any letter you would like except one will be shown as a capital (dominate) and one as a lower case (recessive). This combination is heterozygous for that trait.
To determine the genotype of an individual that shows the dominant phenotype you would cross that individual with one that is?
To determine the genotype of an individual that shows the dominant phenotype you would cross that individual with one that is homozygous recessive. A monohybrid cross of two individuals that are heterozygous for a trait exhibiting complete dominance would probably result in a phenotype ratio is 3 dominant 1 recessive.
What can a punnett square tell us?
Punnett squares demonstrate the percentage of traits that are passed on from one generation to the next. It shows the pairings of dominant and recessive genes and what percentage there is of the next generation having those particular traits.
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.
What is an individual with genotype AAA described as?
An Aa genotype can result in the same phenotype as either an AA or AA genotype, if one of the alleles acts in a dominant fashion. If the A allele is dominant over the a allele, then the phenotype of a heterozygous (Aa) individual will be the same as the phenotype of a homozygous dominant (AA) individual.
