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It is caused by the addition of the 21st chromosome, it is not inherited and so is neither dominant or recessive but it is highly correlated with the age of mothers. If the mother is 30, it is 1 in 910 chance of Down syndrome, and 1 in 28 at age 45.
What else can I help you with?
How can one determine whether a pedigree trait is dominant or recessive?
One can determine whether a pedigree trait is dominant or recessive by observing how the trait is passed down through generations. If the trait appears in every generation, it is likely dominant. If the trait skips generations, it is likely recessive. Genetic testing can also help confirm the inheritance pattern of the trait.
Is Down syndrome a dominant or recessive?
Down syndrome is neither dominant nor recessive. Actually, it is considered to be an "autosomal" trait. This occurs when there is damage to the chromosome.
Is down syndrome a dominant trait or recessive trait?
Down syndrome is neither dominant nor recessive.It is "autosomal" or "other"; it is simply an error in the translation process of Chromosome 21 (three copies instead of two). Instead of 46 chromosomes, a person with Down syndrome will have 47.
Is dimple heridity?
Yes. Dimples are dominant. If you have one or two dimples, you have the dominant trait, and your genotype is D-, meaning that we don't know whether you are homozygous dominant or heterozygous for the trait. If you don't have dimples, your genotype is dd, which is homozygous recessive.
Is disprexia a ressessive trait?
Dyspraxia is not a trait that is passed down in a simple Mendelian recessive or dominant manner like a genetic disorder. It is a complex neurodevelopmental disorder that can be influenced by a combination of genetic and environmental factors.
Is the trait being studied in the pedigree recessive or dominant?
This cannot be determined solely from a pedigree without additional information. The inheritance pattern of a trait can be deduced from the way it is passed down within a family and how it appears in the pedigree. Dominant traits will typically appear in every generation, while recessive traits may skip generations.
How does pseudodominant inheritance manifest in genetic traits within a family?
Pseudodominant inheritance occurs when a recessive trait appears to be dominant in a family due to both parents carrying the recessive gene. This can lead to the trait being passed down to offspring, even though it is recessive.
Is apert syndrome dominant or recessive?
Apert syndrome is typically caused by a sporadic mutation in the FGFR2 gene and is not inherited in a simple dominant or recessive manner. It is considered an autosomal dominant condition, with most cases arising from new mutations.
How is inheritance different from dominant recessive inheritance?
Dominance is when one gene completely takes over the phenotype, and codominance is when two genes are equally expressed. For example: Dominance: Red flower x yellow flower = red flower (red gene is expressed, but yellow gene isn't) Codominance: Red flower x white flower = flower with red petals and white petals (both the red gene and the white gene are expressed)
What do you know about an organisms parents if its homozygous for a certain trait?
If an organism is homozygous for a certain trait, it means that it has two identical alleles for that trait, either both dominant or both recessive. This indicates that both parents contributed the same allele for that trait. Consequently, at least one of the parents must have also been homozygous for that allele or heterozygous, carrying the same allele. This genetic uniformity suggests that the trait is consistently passed down from the parents to the offspring.
A hereditary characteristic that carried by an individual but is not expressed in the phenotype is?
A recessive trait is a hereditary characteristic that is carried by an individual but is not expressed in the phenotype due to being masked by a dominant trait. These traits can be passed down through generations without being visible in the individual's physical appearance.
What allele is represented by capital letters?
In a Punnett square, a capital letter denotes the dominant allele and a lowercase letter denotes the recessive allele.
