A couple finds out that both the male and the female are heterozygotes (carriers) for Tay Sachs. Draw a punnet square for this couple. What is the likelihood that this couple will have an offspring with Tay Sachs?

Q: Hemophilia is a typical example of Sex-Linked Inheritance. If the man is hemophilic and marries a…

A: Haemophilia is also known as bleeder's disease. This disease was first studied by John otto in the…

Q: The autosomal (not X-linked) gene for brachydactyly, short fingers, is dominant to normal finger…

A: Brachydactyly is an autosomal dominant trait. Normal = bb Affected = BB, Bb

Q: A woman has type O blood.  Her child has type O blood.  Could a man with B blood type be the father?

A: Blood is a fluid that circulates continuously and gives the body nutrients, oxygen, and waste…

Q: If the proband (III-2) marries a heterozygous woman, what is the probability that they will have a…

A: Autosomal dominant inheritance is a type of inheritance where the presence of a single dominant…

Q: Hemophilia results from a sex-linked gene. The disease is most common in males, but the hemophilia…

A:

Q: Explain why it is not possible for two parents, one with type AB blood and the other with type O…

A: Blood group is classified based on the presence and absence of antibodies and inherited antigenic…

Q: What is the probability that a parent with Type O blood and a parent with Type AB blood have a child…

A: The blood group of humans is controlled by multiple alleles IA, IB & IO IA & IB are…

Q: Two parents with blood types A and B have a child who has O blood type. What is the chance that…

A: Blood group of an individual can be determined by presence/ absence of antigens on RBC surface while…

Q: Cystic Fibrosis (CF) is an autosomal recessive condition. Therefore, heterozygous (Cc) carriers do…

A: As a hereditary counselor, we would direct them through the probabilities of their children…

Q: A man with thalassemia minor marries a normal woman.  What phenotypic ratios of thalassemia-affected…

A: Thalassemia is an inherited blood disorder in which the body makes an abnormal form of hemoglobin.…

Q: Because Elsa has received a confirmed diagnosis of beta-thalassemia major, which of the following…

A: Beta thalassemia is an inherited blood disorder. This means it is passed down through the parent’s…

Q: Mr. and Mrs. Smith, both 40 years of age, are healthy with no knowngenetic conditions. Their newborn…

A: Down syndrome is defined as the condition in which an individual contains an extra chromosome. In…

Q: What is the probability of the marriage of a Carrier of Beta thalassemia and a Carrier of sickle…

A: Both Sickle Cell anaemia and beta Thalassemia  follows autosomal recessive inheritance pattern. This…

Q: A color-blind man marries a woman with normal vision whose father was color-blind.  Remember that…

A: The alleles are generally of dominant and recessive type and some other forms like codominant and…

Q: In humans, hemophilia is a sex-linked recessive disease, and the gene is located on the X…

A: Answer: HEMOPHILIA = It is the chromosomal disorder , which sex-linked recessive disease, men are…

Q: A woman has type O blood.  Her child has type A blood.  Could a man with AB blood type be the…

A: Blood is an important fluid tissue in the body that transports oxygen and nutrients to all other…

Q: The aldose gene is 10 map units from the fructose gene. (A = dominant allele, can produce aldose; a…

A: Alleles are the alternative forms of a gene that are located on the same locus of a homozygous…

Q: A form of hemophilia is caused by a sex-linked (X-linked) recessive gene. A phenotypically normal…

A: 50 percent chances.

Q: In a cross between an individual with Huntington disease and an unaffected individual, what are the…

A: Huntington disease is a progressive brain disorder that causes uncontrolled movements, emotional…

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: PKU is an inherited disease caused by a recessive allele. If a woman and her husband, who are both…

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

Q: Cystic fibrosis is a disease that is passed down through the generations. The recessive alleles for…

A: Genes carry the traits from one generation to another. Genes that code for different forms of a…

Q: A mother has AB blood type has a child of AB blood type. What are all the possible genotypes of the…

A: Possible genotypes of father can be- IAIA , IAIO , IBIB, IBIO, IAIB

Q: Why can a person carrying a translocation be normal except for theinability to have children?

A: Translocation is a hereditary change were a piece of one chromosome servers and connects to another…

Q: Jackie is blood type O, her mother is blood type A, and she believes her father is blood type AB. Is…

A: No , she is not correct..Blood type O is recessive, so it becomes blood group  O should be in a…

Q: A man with type B blood starts a family with a woman  having type A blood. The woman's parents both…

A: Blood group of an individual is represented by presence or absence of antigen and Antibody on RBC…

Q: Neurofibromatosis-1 (NF1) is an autosomal dominant disorder where tumours form in the base layer of…

A: The probability is 1/4

Q: Duchenne muscular dystrophy is sex linked and usuallyaffects only males. Victims of the disease…

A: Duchenne muscular dystrophy is an X-linked recessive disorder. Males have an XY chromosomal pattern,…

Q: Mark has an autosomal recessive condition called sickle cell anemia, a serious blood disorder that…

A: Sickle cell anemia is an autosomal recessive disorder which ne it can only expression if present in…

Q: In humans, the allele for normal blood clotting, H, is dominant to the allele for hemophilia, h. The…

A: Given that, hemophilia is X linked trait. The normal dominant allele for blood clotting is H and the…

Q: If a man with type O blood has a child with a woman who is heterozygous for type A blood, what are…

A: Blood type is determined by the presence or absence of certain antigens on the surface of red blood…

Q: A recently married couple are both heterozygous for cystic fibrosis, a recessive genetic disorder.…

A: Both the part a) and part b) are the same questions. So I am answering only part a). An autosomal…

Q: A man with type A blood has children with a women with type B blood. Their first child has type O…

A: The external appearance of an individual for any trait is called the phenotype. The genotype is the…

Q: mother has A blood type has a child of B blood type. What are all the possible genotypes of the…

A: Some character is shown when alleles are present in homozygous form(Dominant/ recessive) while some…

Q: Two parents who do not have a condition have a daughter who has the condition. Which of the…

A: Gregor Mendel recognized that there are two hereditary factors. The terms gene and allele were yet…

Q: How many gamete types can be produced from an individual with the genotype AABbCcDDEeFFGg? (Assume…

A: Genotype: A person's genotype, which includes all of their inherited genes, is referred to as their…

Q: If the blood type of a person is O, does the person possess multiple alleles? Explain

A: Blood type in humans is broadly classified into four categories A, B, O, and AB depending on the…

Q: A child has a blood type O. His mother has blood type O, and his father has blood type AB. Provide…

A: There are four types of blood group found in humans viz. O, A, B and AB.

Q: Trisha (mother of the baby) Charlotte (baby) Ronnie (Trisha's husband) Johnny (the grad student)…

A: I) Origin of bombay blood group  is in Mumbai in 1952.

Q: Hemophilia is another example of an X-linked disease caused when a recessive allele (Xh) is…

A: Hemophilia is a bleeding disorder;which shows X linked recessive pattern of inheritance as the…

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.