Achondroplasia is a dominantly inherited condition with a phenotype that includes a large head and short stature.  It is caused by mutations in the gene for fibroblast growth factor receptor 3 (FGFR3), which causes the receptor to be active even when its ligand is not present.  Compared to individuals without achondroplasia, individuals who are heterozygous for this condition most likely:A.do not have the achondroplasia phenotype because expression of the wild-type receptor masks the expression of the mutant receptor.B.have the achondroplasia phenotype because having one copy of the mutant receptor causes the receptor to be inappropriately activated.C.have an intermediate phenotype between wild-type and achondroplasia because both wild-type and mutant receptors are expressed.D.do not have the achondroplasia phenotype because only the wild-type receptor is expressed.

Achondroplastic dwarfism isCorrect Answer  a disorder that affects the epiphyseal plates of long bones   a disorder that affects the growth of the cranial bones You Answered  another name for pituitary dwarfism   a deficiency in growth hormone

Achondroplasia is a form of dwarfism caused by a dominant allele. The homozygous dominant genotype causes death, so individuals who have this condition are all heterozygotes. If a person with achondroplasia mates with a person who does not have achondroplasia, what percentage of their children would be expected to have achondroplasia?0%100%50%75%

Which genetic disorder is commonly associated with limb anomalies such as shortening or absence of limbs?

describe the causes and effects of inherited conditions such as haemophilia andred-green colour blindness (sex-linked inheritance), polydactyly (dominant allele) andcystic fibrosis (recessive allele)

If a child is born with a genetic disorder when neither of his biological parents have that disorder, the trait is likely to be caused by: a recessive allele on an autosome a gene on the X chromosome a dominant allele on the autosome a gene on the Y chromosome