Cystic fibrosis is a disease that occurs when an individual carries two copies of a recessive version of a membrane transport gene. A person that is a carrier for cystic fibrosis (that means they carry one copy of the gene that causes cystic fibrosis but their other copy is normal - they do not have cystic fibrosis) has a child with another person that is also a carrier for cystic fibrosis. What is the probability that this couple has three children that do not have cystic fibrosis AND are also not carriers of cystic fibrosis? 0.25 0.422 0.016 2.25 0.75

Q: Familial Down syndrome is similar to primary Down syndrome in that it is caused by trisomy 21.…

A: Two normal copies of 14, two normal copies of 21: A.Two normal copies of 21, one normal copy of 14:…

Q: Explain the equation E+S---->ES----> E + P.

A: Given equation,  E+S---->ES----> E + P E = Enzyme S= Substrate P= Product Enzyme is required…

Q: Phenylketonuria (PKU) is an autosomal recessive disease that results from a defect in an enzyme that…

A: Phenylketonuria is an inborn error of metabolism which happened due to decreased or low metabolism…

Q: A defective gene on chromosome 15 causes Tay-Sachs disease. It is a central nervous system…

A: Given: A pedigree. A defective gene on chromosome 15 causes Tay-Sachs disease. Individual III - 1 -…

Q: estions below all refer to the following pedigree. The locus for allele D/d determines how cilia on…

A: It is evident that the trait is not sex-linked because:-   In the case of Y-linked disorders, only…

Q: nheritance of one mutant allele of BRCA1 is associated with 70-80% lifetime risk of developing…

A: BRCA1 is a tumor suppressor gene inactivation leads to breast cancer.

Q: During secondary treatment or biological treatment which of the following do not happen (1) Decrease…

A: Secondary wastewater purification systems use microorganisms to remove contaminants from…

Q: Junctional epidermolysis bullosa (JEB) is a severe skin disorder that results in blisters over the…

A: Junctional epidermolysis bullosa is type of skin disorder in which blisters develop on the skin of…

Q: Pedigree information regarding the incidence of Tay-Sachs within a family is depicted above. The row…

A: Human beings are diploid organisms, i.e., hey have two sets of chromosomes. Humans carry 22 pairs of…

Q: A possible explanation for the increased incidence of Tay-Sachs disease among Ashkenazi Jews is

A: Tay Sachs is a rare autosomal recessive disorder that causes mental and physical disabilities…

Q: In a woman who is a carrier of a mutant OTC deficiency allele, her sons who receive the mutant…

A: An alteration in the ornithine transcarbamylase (OTC) gene results in the genetic disorder known as…

Q: In the following schematic drawing of a Holliday junction,one chromatid is shown in red, and the…

A: a) Cuts should occur at positions 2 and 4 to get recombinants. A Holliday model can be resolved in…

Q: A defective gene on chromosome 15 causes Tay-Sachs disease. It is a central nervous system…

A: Tay-Sachs disease is an inherited disorder that results in progressive destruction of nerve cells in…

Q: Lesch-Nyhan syndrome is due to a mutation in a gene that encodesa protein called…

A: Pedigree or family tree is a representation of an individual in a family or close relatives that…

Q: The dominant condition elliptocytosis causes red blood cells to become misshapen into oval-shaped…

A: answer given below

Q: The genotype of a dwarf mouse is Igf2 Igf2–. What is the genotype of its father who has normal body…

A: Knowing how features are passed down from parents to children requires incorporating knowledge of…

Q: Galactosemia is a metabolic condition, caused by a recessive allele, which prevents affected…

A: Galactosemia is a disorder of the metabolism of sugar that affects the body processes and metabolism…

Q: he propensity to develop retinal cancer can run in pedigrees of certain families. You have learned…

A: Tumor suppressor genes are important cancer prevention genes since a partial or total inactivation…

Q: 13) Use the image below of the X and Y sex chromosomes of a human to answer the following question.…

A: INTRODUCTION : Chromosomes - In the nucleus of every cell, the DNA molecule is packaged into…

Q: Hyperphosphatemic familial tumoral calcinosis (HFTC) is a condition characterized by an increase in…

A: ANSWER;- A) . Autosomal dominant inheritance : Autosomal dominant inheritance is a way a genetic…

Q: One particularly useful feature of the Hardy-Weinberg equation is that it allows us to estimate the…

A: Hardy-Weinberg equilibrium states that, in a population allele and genotypic frequencies will remain…

Q: my widows peak phenotype is aa.  what is my widows peak genotype.

A: Mendel’s Law of dominance: Out of a pair of contrasting characters present together, only one is…

Q: can two observably different cells have the same geno type, explain?

A: In biology, the genotype is the set of genes in our DNA which is responsible for a particular trait.…

Q: Phenylketonuria is one of the most common recessive genetic disorders in humans. Infants with PKU…

A: Given that, phenylketonuria is one of a recessive genetic disorder characterized by the absence of…

Q: couple has one daughter with Tay-Sachs disease and three other unaffected children. Neither the…

A: Tay-sachs disease appears after birth due to deficiency of enzyme beta-D-N -acetyl…

Q: A defective gene on chromosome 15 causes Tay-Sachs disease. It is a central nervous system…

A: Many genetic disorders are inherited in different patterns. They can be Autosomal or sex-linked.…

Q: In humans the allele coding for normal metabolism of the amino acid phenylalanine (P) is dominant…

A: The alleles are the alternative forms of a gene that are located on the same locus of a homologous…

Q: Cystic fibrosis (CF) is an autosomal recessive trait. A three-generation pedigree is shown below for…

A: Given: Cystic fibrosis (CF) is an autosomal recessive trait. Normal allele =  F      CF mutant…

Q: A SNP marker is found linked to the cystic fibrosis gene. Cystic fibrosis is an autosomal recessive…

A: Cystic fibrosis follows autosonal recessive inheritance. This means that both the alleles should be…

Mitochondrial Mutations

A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.