0
im guessing we are assumeing there is not obvious phenotype to tell us what the genotype is then (otherwise the answer is simply, look).
if you know the area around the gene you are looking at you could amplify it by PCR and sequence it. if your organism is hetrozygous, you will get two peaks for each possition where the alleles don't have the same sequence.
alternitively, if the two alleles are sugnificantly different, you could design separate PCR primers, to give different sized PCR products depending on what allele they annealed to. therfor by looking at the size of your PCR products after being run on an agarose gel, you can determine (if you have one band) if the organism is homozygous or not (if there is two).
also, if one allele has a restriction site in it, again do PCR, but this time digest the DNA with the restriction enzyme and by looking at the products you can determine what alleles were present. only two smaller fragments would be homozygous for the allele with the restriction site, only one large fragment would be homozygou for the allele without and all three fragments would be hetrozygous.
i have assumed your organism is diploid, otherwise you would be required to devise several tests like those above to determine your genotype.
What else can I help you with?
What is the difference between homozygous and heterozygous organism?
if for example we had a yellow and a blue flower yellow being dominant (Y) and blue being recessive (y) a homozygous organism has the phenotype of either being YY or yy and a heterozygous organism could only be Yy.
What is the heterozygous for the A allele?
Heterozygous for the A allele means having one copy of the A allele and one copy of a different allele (e.g., a or B) at a particular gene locus. In genetics, the term heterozygous refers to an individual possessing two different forms (alleles) of a particular gene.
What is the purpose of a test cross?
A test cross helps to predict the probable, not actual, outcome of a genetic cross. This is what a Punnet Square is used for. You can cross just one gene, or you can do more complicated crosses that involve many genes. For example, if your genotype is heterozygous brown eyes and homozygous blonde hair, your spouse has homozygous blue eyes and heterozygous brown hair, and you want to see the chances of your kids having blue or brown eyes and blond or brown hair, you could do a test cross to see all the possibilities.
What is the difference between a homozygous individual and a heterozygous individual?
In genetics, homozygous genes are identical alleles, while heterozygous genes have different alleles. For example, TT(same alleles) is homozygous genotype, while Tt (different alleles) is a heterozygous genotype.
Why is it difficult to determine the genotype of an organism that has a dominant phenotype?
NO, because a dominant phenotype could either be homozygous or a heterozygous.so unless you are sure about the genotype of parents we can't determine it...but we can determine the genotype of a person showing reccessive phenotype, as a recessive trait always expresses itself in a homozygous condition...
What is a synonym for a homozygous?
Homozygous is the state of the two alleles of a gene both being dominant.A synonym could be same and an antonym could be heterozygous.
What genotype could be described as heterozygous?
Yes - Hh is heterozygous. HH is homozygous, and hh is homozygous.
What is the difference between homozygous and heterozygous organism?
if for example we had a yellow and a blue flower yellow being dominant (Y) and blue being recessive (y) a homozygous organism has the phenotype of either being YY or yy and a heterozygous organism could only be Yy.
Is AA an homozygous or an heterozygous?
AA could be either homozygous or heterozygous, depending on whether the individual inherited the same allele (A) from both parents (homozygous) or different alleles (Aa) from each parent (heterozygous).
What is the difference between homozygous and heterozygous?
Heterozygous is when the organism has two different alleles for a traitHomozygous is when they have two of the same the sameexample of homozygous= two blue eyesexample of heterozygous= one blue eye and one green eyeHomozygous is when the combination of alleles are the same. EX: AA or BB. Heterozygous are when the combination of alleles are different. EX: Aa or Bb.
What is the heterozygous for the A allele?
Heterozygous for the A allele means having one copy of the A allele and one copy of a different allele (e.g., a or B) at a particular gene locus. In genetics, the term heterozygous refers to an individual possessing two different forms (alleles) of a particular gene.
Is the plant with flowers homozygous or Heterozygous?
Either. It matters. Since white is dominant, the allele (saying it is T for white and t for purple) could be either TT or Tt and still come out white. If the white flower is a purebred, then it is homozygous, therefore, TT. However, the flower could be white and be heterozygous.
How could a guinea pig breeder whether a rough-coated guinea pig is homozygous or heteorzygous for this trait?
A breeder could determine if a rough-coated guinea pig is homozygous or heterozygous by conducting a test mating. Breeding the rough-coated guinea pig with a smooth-coated guinea pig would show if the rough coat is dominant or recessive. If all the offspring have rough coats, it indicates the rough-coated guinea pig is homozygous for the trait. If both rough and smooth-coated offspring are produced, then the rough-coated guinea pig is heterozygous.
What type of alleles are present in an organism?
Capital letters usually denote dominant alleles. Therefore QQ genotype would contain two dominant alleles for the Q genotype.
How could a boxer dog breeder determine whether a wire-hair boxer dog is homozygous or heterozygous for this trait?
A boxer dog breeder can determine whether a wire-hair boxer is homozygous or heterozygous for the wire-hair trait through genetic testing or by performing a breeding test. By breeding the wire-hair boxer with a known homozygous recessive dog (that exhibits the opposite coat type), the breeder can observe the offspring's traits. If all offspring display the wire-hair trait, the original dog is likely homozygous; if any offspring exhibit the other coat type, the original dog is heterozygous. Additionally, genetic testing can directly reveal the dog's genotype for the wire-hair trait.
What is the purpose of a test cross?
A test cross helps to predict the probable, not actual, outcome of a genetic cross. This is what a Punnet Square is used for. You can cross just one gene, or you can do more complicated crosses that involve many genes. For example, if your genotype is heterozygous brown eyes and homozygous blonde hair, your spouse has homozygous blue eyes and heterozygous brown hair, and you want to see the chances of your kids having blue or brown eyes and blond or brown hair, you could do a test cross to see all the possibilities.
What is an analogy for homozygous?
An analogy for homozygous could be having two identical keys that can fit into the same lock perfectly. Each key is identical to the other, just like homozygous alleles contain the same version of a gene.
