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Q: What is a congenital disorder caused by having an extra 21st chromosome which results in a flat face short stature and mental retardation?
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Is a congenital disorder the same as a gametic disorder?

No. A gametic disorder is one that results from an absent or defective gene. A congenital disorder is caused by incidents at birth such as starvation of oxygen after an umbilical cord is wrapped around the newborn's neck. This can cause defects such as Cerebral Palsy. A few examples of a gametic disorder are cystic fibrosis and hemophilia.


What are the genotype and phenotypes of Down syndrome?

Down syndrome is a genetic disorder that adversely affects both genotype and phenotype. Down syndrome effects on phenotype include slow mental and physical development of an individual.Down syndrome is characterized by a combination of phenotypic features that includes typical dysmorphic features and mental retardation. Congenital malformations of the heart (30-40% of the patients) and gastrointestinal tract are common. Congenital absence of teeth has been reported in 23 to 47%


Recessive disorder that results from the absence of an enzyme that converts one amino acid into another one?

Huntington's disease


True or false a congenital disorder is present at birth?

A congenital disorder, or congenital disease, is a condition existing at birth and often before birth, or that develops during the first month of life (neonatal disease), regardless of causation.


What is a congenital defect that results in the abnormal positioning of the urinary meatus?

Epispadias A congenital defect that results in the abnormal positioning of the urinary meatus


A lack of which hormone results in mental retardation?

it has nothing to do with hormones.


Is Edwards syndrome autosomal or sex-linked?

Down Syndrome is a trisomy of the 21st chromosome as opposed to an allelic inheritance through the X chromosome. Trisomy is a somatic disorder caused by improper division during gametogenesis (usually of the ovum) that results in 3 copies of the 21st chromosome in the egg once it is fertilized.


What TYPE of a sperm must fertilize an egg to result a female child?

X Chromosome results in a female Y Chromosome results in a male All sperm are either going to be an X or Y chromosome All eggs are X chromosome only


Is Klinefelter Syndrome sex-linked or autosomal?

Klinefelter Syndrome is sex-linked, because it is a genetic defect that results in a male having an extra X chromosome.


What chromosome is ADHD found on?

The precise chromosome is not known; future research may yield results.


An important congenital muscular disease that results in the degeneration of the skeletal muscles by young adulthood is called?

because no one cares


A lack of which hormone results in cretinism with mental retardation and abnormal growth in children?

thyroxine