How is it possible Jonathan has the dominant disorder, Huntington’s Disease, if none of his family had it?   a) The mutant allele remained ‘hidden’ in previous generations. b) He is homozygous for mutant huntingtin alleles unlike his grandparents, who are clearly heterozygous for the condition. c) The appearance of Huntington Disease in him might be the result of a new mutation appearing during his lifetime. d) His parents and grandparents were ashamed to admit they had it.

Q: We often speak of diseases such as phenylketonuria (PKU) andachondroplasia as having a genetic…

A: When the disorder is caused by the mutation in a gene or multiple gene or by combination of the gene…

Q: Identify the sex and any genetic conditions by analyzing the karyotype of this individual. 1.a) male…

A: Normal Human body consists of 23 pairs of chromosomes i.e., 46 chromosomes out of which one pair is…

Q: The fraternal birth order effect, in which the number of brothers a boy's mother carried before him…

A: Introduction  Birth order refers to the position of a child in a family relative to their siblings.…

Q: A couple has a child with neurofibromatosis. They come to your genetic counseling office for help.…

A: The mode of inheritance is a pattern of obtaining parenteral alleles  or genes to the offspring's.…

Q: In a particular family, children of a diseased mother are all affected, and their maternal…

A: Defective genes cause such mutations or disorders that run down the family and members. Such…

Q: Is Turner syndrome inherited from family?

A: Chromosomal aberration is an abnormal phenomenon in which either one pair or both of chromosomes are…

Q: The following data were presented to a court during a paternity suit: a) the infant is a universal…

A: in humans, the ABO blood grouping is primarily used to identify a persons blood type. this grouping…

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: Recessive genes are usually expressed in humans only when ___ a ) they are coding for genetic…

A: There are two alleles of a single trait or a character, one which we are seeing in each generation…

Q: Stefan has launched a paternity suit to determine whether he is the father of an orphan residing in…

A: Stefan has launched a paternity suit to determine whether he is the father of an orphan residing in…

Q: Two parents with sickle-cell trait have a child. What is the chance that the child has sickle-cell…

A: Humans contain twenty two pairs of autosomal chromosomes and one pair of sex chromosomes. A female…

Q: The presence of certain factors in a person’s genetic makeup that increase the likelihood of…

A: The genetic arrangement is something that matters greatly to a person’s characteristic makeup. It is…

Q: Neurofibromatosis type 1 (NF1) is an inherited is an inheritent dominant disorder. The phenotype…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. If you need help with other sub…

Q: Having dimples (D) is dominant over not having dimples (d). A dimpled woman (whose father had no…

A: According to guidelines we have to answer the first 3 sub-parts only. so please kingly post the…

Q: Write true if the statement is correct. Right false if the statement is not correct. If the…

A: The new Science of genetics was first propounded by Gregor Johan Mendel in the year 1866. He is Said…

Q: What are the possible genotypes of the PTC locus?

A: * genotype means collection of genes that  refers to two alleles of a particular gene and genotype…

Q: Sickle anemia is a favorable mutation. There is only one amino acid different in sickle haemoglobin…

A: Sickle cell anemia is genetic disease in which blood cells contort into a sickle shape. RESULTS- 1.…

Q: Why Recessive CF disease alleles either produce no CFTR or produce nonfunctional or less functional…

A: Cystic fibrosis (CF) is a classical example of recessive disease. It is a disease that is inherited.

Q: The gene known to be mutated in cases of Agammaglobulinemia 2 (which is inherited in an autosomal…

A: A person with agammaglobulinemia has extremely low levels of the immune system's defense proteins,…

Q: What is Epistasis? A) When one gene effect another B) When one gene effect multiple phenotype C)…

A: Introduction  Genes are the key component of genetic material which control almost all the cellular…

Q: Two parents, without any family history of cystic fibrosis (CF), have a child with CF. A. What do…

A: Cystic fibrosis is a genetic disease in which thick mucus is built up in the tubes, ducts and…

Q: Suppose that a grandfather, mother, and son all have the same homozygous dominant genotype for a…

A: Non-mendelian inheritance is the type of inheritance in which the complex genetic basis is…

Q: a) What is the chromosomal abnormality associated with Fragile-X Syndrome?   b) What is the…

A: Fragile X syndrome is a genetic condition which causes many problems in development.

Q: Andy and Anne do not have polydactyl. Is it possible for them to have a child with polydactyl?…

A: Polydactyly is a condition where an individual is brought into the world with additional fingers or…

Q: The gene known to be mutated in cases of Agammaglobulinemia 2 (which is inherited in an autosomal…

A: A person with agammaglobulinemia has extremely low levels of the immune system's defense proteins,…

Q: 11. Using the hypothetical pathway below, determine what proportion of offspring will be Orange if…

A: In this pathway, the presence of orange colour means the absence of C and the presence of A+ B in…

Q: If both parents carry one copy each of the mutation that causes Huntingtons , what are the odds that…

A: Huntington disease is the neurodegenerative disorder, it causes breakdown of nerve cells in the…

Q: What is sickle cell anemia? What is the true inheritance pattern? How did scientists discover the…

A: ▪︎Sickle cell anemia is a disease in which the body produces abnormally shaped red blood cells that…

Q: Considering that Noor and Hamza do produce a first child and name her Roop, what is the likelihood…

A: PKU (Phenylketonuria) is an inherited disorder caused by a lack of the enzyme phenylalanine…

Q: What is the key component(s) of usher syndrome. A) The Effect of mutation and Hot-spots of mutation?…

A: Usher syndrome is a hereditary autosomal disorder passed down through the generations from parent to…

Q: Is the sickle cell allele dominant or recessive? Explain. What is sickle cell trait?

A: Sickle cell is a red blood cell trait. The red blood cells become sickle cell in shape.

Q: The gene known to be mutated in cases of Agammaglobulinemia 2 (which is inherited in an autosomal…

A: The IGLL1 gene is known to be mutated in cases of Agammaglobulinemia 2, which is an inherited…

Q: Suppose that a grandfather, mother, and son all have the same homozygous dominant genotype for a…

A: Non-mendelian inheritance is a type of inheritance in which inheritance is not based on Mendel laws.…

Q: If a gene is paternally imprinted, it means that: A.) it is on the X chromosome B.) it is on the Y…

A: Genome imprinting is a process by which a gene is silenced through methylation of DNA. Thus, only…

Q: A)A woman with type O blood is expecting a child. Her husband is type A and her husband's parents…

A: The ABO blood type is the type of blood typing in which the presence of antigen a and b on the…

Q: What are similarities between Jacob Syndrome and Patau Syndrome?

A: Jacob Syndrome is a chromosomal aberration caused by the non-disjunction of the Y chromosome. They…

Q: The pedigree pictured is of an extended family where a large percentage of family members develop…

A: Colon cancer , a form of cancer which starts in the large intestine and spreads throughout the body…

Q: The gene known to be mutated in cases of Agammaglobulinemia 2 (which is inherited in an autosomal…

A: Agammaglobulinemia refers to a collection of inherited immune deficiencies that are characterized by…

Q: The mutations found in the CF gene that result in cystic fibrosis are recessive because.. (Justify…

A: The mutations found in the CF gene that result in cystic fibrosis are recessive because Normal or…

Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.