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Why must the genotype for Huntington's chorea be heterozygous instead of homozygous dominant?
The homozygous dominant form is lethal, because it produces twice as much protein (HH = two doses of H) as Hh would.
Only if you assume that the alleles for Huntingtons are co-dominant. According to an article called Homozygotes for Huntington Disease, 'the clinical expression of HD among homozygotes is not more severe than observed in heterozygotes.'
What else can I help you with?
Genotype made of two different alleles?
Homozygous
What is the differences between homozygous dominant and homozygous recessive and heterozygous?
Homozygous dominant individuals have two copies of the dominant allele for a trait, homozygous recessive individuals have two copies of the recessive allele, and heterozygous individuals have one copy of each allele. Homozygous dominant and heterozygous individuals will express the dominant trait, while homozygous recessive individuals will express the recessive trait.
Apply the term homozygous heterozygous dominant or recessive to describe plants with the genotypes PP and Pp?
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What phenotype is produce by each of the following genotypes?
Genotype: AA - The phenotype is homozygous dominant, exhibiting the dominant trait. Genotype: Aa - The phenotype is heterozygous, exhibiting the dominant trait. Genotype: aa - The phenotype is homozygous recessive, exhibiting the recessive trait.
What are three types of genotypes that exist for pea plant height?
Three types of genotypes that exist for pea plant height are: TT - Homozygous dominant genotype for tall height Tt - Heterozygous genotype for tall height tt - Homozygous recessive genotype for short height
What genotype will be produced by a heterozygous?
The trait that would be expressed in a heterozygous genotype would be the dominant trait. If one allele is dominant then it will be expressed.
What genotype is Yy homozygous or heterozygous?
Yy is a heterozygous genotype. Homozygous would be YY or yy.
What word describes an organism that has the genotype Bb?
The most accurate description of an organism with genotype AaBb is heterozygous. A homozygous genotype is aaBB and AA.
What is the genotype and phenotype of homozygous?
Are you talking about phenotype or genotype? Phenotype is the expression of the genotype. Genotype is what you inherited. Phenotype is what you see. Homozygous is the same. Heterozygous is different. If you inherit one allele for blue eyes and one allele for brown eyes, your phenotype should be brown eyes. Your genotype would be brown eyes, blue eyes. You would have a heterozygous genotype.
An example of a heterozygous recessive genotype is?
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.
What has the Tt genotype?
The allele pair Tt is used to represent an individual who has a dominant heterozygous genotype for tallness. The dominant gene but not the recessive gene is physically manifested.
Which is a heterozygous or hydrid genotype?
A heterozygous genotype consists of a dominant gene and a recessive gene. Homozygous genotypes consist of two dominant genes (Homozygous Dominant) ro two recessive genes (Homozygous Recessive).Heterozygous: XxHomozygous: Dom. XXRec. xx
