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Homozygous Dominant for a trait means that an organism has two dominant alleles for that trait. Here's an example:
Trait: Widow's Peak
Widow's Peak allele: Dominant (D)
No widow's peak allele: Reccessive(d)
Homozygous Dominant (DD)
Homozygous Reccessive (dd)
Heterozygous (Dd)
What else can I help you with?
What does it mean that an organism is homozygous recessive for a trait?
An organism that is homozygous recessive for a trait carries two copies of the recessive allele for that trait. This means that the individual will express the recessive trait because there is no dominant allele to mask its expression.
What does it mean if an organism is homozygous?
An organism is considered homozygous when it has two identical alleles for a specific gene, one inherited from each parent. This means that both alleles express the same trait, whether dominant or recessive. For example, if an organism has two alleles for blue eyes (bb), it is homozygous for that trait. In contrast, heterozygous organisms possess two different alleles for a gene.
How do you prove if something is heterozygous?
The carrier must be Homozygous because if he were hetero it must be Hh and the dominant gene is expressed but homozygous gives them the possibility of hh (only a carrier) or HH (definitely a carrier) Don't totally understand the previous answer; however, I understand the question to mean that you want to know if you are homozygous or heterozygous for a certain trait. If you express a recessive phenotype, that is you have blue eyes for example, you are definitely homozygous for that trait. If one of your parents has a recessive trait, like blue eyes, and the other parent expresses a dominant trait, like brown eyes, AND if you have brown eyes, you can be sure that you are heterozygous. Otherwise it is impossible to tell until you have children. Then you can work backwards from you and your spouse, look at their parents and your parents and then figure the only possible way all those conditions could exist is if you are heterozygous or if you are homozygous for that trait.
What do homozomes and heterozygous mean?
In genetics, you have certain traits that give you certain features. You get one part from each parent. You may have a dad with brown eyes and a mom with blue. Your dad maybe BB or Bb, and your mom bb. Like in eye color, there's brown, blue, hazel, and other colored eyes. Brown eyes is a dominant trait. So it is homozygous dominant or heterozygous (homozygous dominant = BB, heterozygous = Bb). Blue eyes are a recessive trait (homozygous recessive = bb). So, homozygous are carrying one single part of the trait, and heterozygous is carring a part of both traits.
What does the notation bb mean to geneticists?
In genetics, the notation "bb" typically refers to a homozygous recessive genotype for a particular gene, where both alleles are the same and recessive. This indicates that an organism carries two copies of a recessive allele, which may result in the expression of a specific trait associated with that allele. For example, if "b" represents a gene for a specific trait, then "bb" would signify that the organism exhibits that recessive trait.
What does it mean to be homozygous dominant heterozygous or homozygous recessive?
Homozygous means "same" so a homozygous recessive trait would be a same [with parents] trait that is not the stronger trait which is dominant. Dominant is stronger showing trait, recessive is weaker trait. If you are dealing with Punnett squares then tt is homozygous recessive and TT is homozygous dominant. Hope this helped...
What does it mean that an organism is homozygous recessive for a trait?
An organism that is homozygous recessive for a trait carries two copies of the recessive allele for that trait. This means that the individual will express the recessive trait because there is no dominant allele to mask its expression.
What does it mean if an organism is homozygous?
An organism is considered homozygous when it has two identical alleles for a specific gene, one inherited from each parent. This means that both alleles express the same trait, whether dominant or recessive. For example, if an organism has two alleles for blue eyes (bb), it is homozygous for that trait. In contrast, heterozygous organisms possess two different alleles for a gene.
Is AA a homozygous genotype?
homozygous = AA & AA Heterozygous = Aa
What does it mean to have a dominant trait?
In genetics, a trait is considered dominant when it determines a phenotype over a recessive trait. For example, AA is crossed with AA to make Aa, Aa, Aa, and Aa. If "A" is the dominant trait and "a" is the recessive trait, then since this cross produces heterozygous progeny, they will all show the dominant phenotype. A dominant trait is just how it sounds, it dominates over recessive traits when they are both present.
Which term mean the state of having two identical alleles for the same trait?
Homozygous.
What does it mean to be homozygous for a trait?
both chromosomes from your parents are the same
How do you prove if something is heterozygous?
The carrier must be Homozygous because if he were hetero it must be Hh and the dominant gene is expressed but homozygous gives them the possibility of hh (only a carrier) or HH (definitely a carrier) Don't totally understand the previous answer; however, I understand the question to mean that you want to know if you are homozygous or heterozygous for a certain trait. If you express a recessive phenotype, that is you have blue eyes for example, you are definitely homozygous for that trait. If one of your parents has a recessive trait, like blue eyes, and the other parent expresses a dominant trait, like brown eyes, AND if you have brown eyes, you can be sure that you are heterozygous. Otherwise it is impossible to tell until you have children. Then you can work backwards from you and your spouse, look at their parents and your parents and then figure the only possible way all those conditions could exist is if you are heterozygous or if you are homozygous for that trait.
What do homozomes and heterozygous mean?
In genetics, you have certain traits that give you certain features. You get one part from each parent. You may have a dad with brown eyes and a mom with blue. Your dad maybe BB or Bb, and your mom bb. Like in eye color, there's brown, blue, hazel, and other colored eyes. Brown eyes is a dominant trait. So it is homozygous dominant or heterozygous (homozygous dominant = BB, heterozygous = Bb). Blue eyes are a recessive trait (homozygous recessive = bb). So, homozygous are carrying one single part of the trait, and heterozygous is carring a part of both traits.
What does the notion TT mean to geneticists?
In genetics, the notation "TT" typically refers to a homozygous dominant genotype for a specific trait, where both alleles of a gene are the same and dominant. For example, if "T" represents a dominant allele, an organism with the genotype "TT" will express the dominant phenotype associated with that allele. This concept is fundamental in Mendelian genetics, helping to predict inheritance patterns in offspring. Understanding genotypes like "TT" aids geneticists in studying traits and their transmission through generations.
What does it mean to be pure for a trait?
Being pure for a trait means that an individual carries only one form of the gene that determines that trait. This makes the individual homozygous for that trait and guarantees that the offspring will inherit that specific form of the gene.
What does the symbol Tt mean to a geneticist?
at least one dominant allele: The answer above ^ is WRONG: The notation TT means that the chromosomes that carry alleles for a certain characteristics both have a dominant gene,which means TT is a two dominant alleles because each T is one dominant allele. SHORTER IS: 2 DOMINANT ALLELES.
