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: According to the pedigree below, what mode of inheritance is occurring? A)Autosomal dominant…

A: It is a chart or diagram that exhibits the presence or absence of a trait that can be related to the…

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: Based on the observed inheritance pattern and ratio of phenotypes, what are the genotypes of the…

A: Cystic fibrosis is an autosomal recessive Inheritance. It affects the digestive system and lungs. It…

Q: One of the most famous cases of an X-linked recessive mutation in humans is that of hemophilia found…

A: Hemophilia is a bleeding disorder in which the blood lacks clotting factors. It is X-linked…

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: Which of the following statements is true regarding the inheritance of a human X-linked recessive…

A: A recessive trait is the trait that expresses only when present in 2 copies i.e expresses only when…

Q: A mutation results in an enzyme that is partially active compared to the wild -type allele. This…

A: A mutation is the alteration of the nucleotide sequence of the genome of an organism, virus or…

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: completely dominant to the allele for straight tail for an X-linked maternal effe A) A male with a…

A: X-linked could be a attribute wherever a cistron is found on the X chromosome. Humans and…

Q: For an X-linked recessive disease where the father is unaffected: a) An affected father cannot pass…

A: When it is an X linked recessive pattern of inheritance, disease can only be manifested when it is…

Q: Name 5 genetic diseases/disorders caused by chromosome mutation, the chromosomes involed and their…

A: Inheritance is the process by which the parental characters are are passed on from the parents to…

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: A pedigree lists a father as the proband for a genetic disorder that he inherited from his mother.…

A: Inherited disorders are genetic conditions that are passed down from parents to their offspring…

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: Raedwald is color blind.  His four sisters and his parents all have normal color vision.  Who passed…

A: Introduction:- The X chromosome contains the gene that causes colour blindness. Red-green colour…

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: What is the underlying genetic defect that causes xeroderma pigmentosum?How can the symptoms of this…

A: Xeroderma pigmentosum condition is a result of specific mutations in the DNA and it is the autosomal…

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: 1a) Explain how amino acids in casein could reach the liver, starting from the moment when the…

A: Amino acids are the monomers that make proteins.

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: Genetic Markers are___Portions of a ___whose inheritance patterns can be followed A) unidentifiable,…

A: Genetic markers can be described as DNA sequences whose positions on chromosomes are predefined.…

Q: 1 2 3 6 7 8 10 11 12 13 14 15 16 17 18 19 | | | |

A: Pedigree analysis  It is the study of the history of inheritance, distribution, and expression of a…

Q: If a trait is X-linked recessive, who would express the trait? A) females homozygous for the…

A: X linked recessiveIt is a mode of inheritance in which mutation occurs in the gene of the X…

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: A case when a recessive allele would be expressed even when only one copy is present would be___ a…

A: Inheritance patterns are of different type’s   Mendelian inheritance, incomplete dominance,…

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: 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: If a Mother's genotype is IAi and her Daughter's genotype is ii and the mother claims a man who is…

A: Note: In this question, there is no part c that could be used to answer part d. So we will solve the…

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: Why must the carrier of a genetic disease be heterozygous?

A: Homozygous means a person carries two identical pair of the gene whereas heterozygous means the…

Q: Recessive genetic disorders are more frequent than disorders inherited as dominant because : a)…

A: Recessive genetic disorders are genetic conditions which can cause disease in an individual only…

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: Could the trait indicated in the pedigree above be caused by an autosomal gene? Hint: consider each…

A: Each gene that codes for a specific protein exists as two variants known as alleles. Alleles can…

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.