Marfan syndrome is a genetic trait caused by in a dominant allele. The trait causes a weakening of the aorta that can be fatal. A teenager whose mother has the syndrome (but whose maternal grandfather was not affected), and whose father was unaffected, is concerend that she may have the trait. a. What is the phenotype of each of her parents? Genotype? b. What is the chance that the teenager has Marfan syndrome?

Q: Imagine that you are in your late 30s or early 40s and decide that you want a child. You realize…

A: Genetic screening is the tests that are less invasive and are done before the diagnostic tests. If…

Q: A couple in which the vision of both is normal, has four children. In them and in their descendants…

A: Colour blindness is a genetic disease in which there is a reduced tendency to differentiate between…

Q: 17. Who would be more likely to display a recessive X linked trait (like color blindness) 1. Male…

A: X linked recessive traits like colorblindness are due to mutations on the X chromosome. Males have…

Q: 3. The father shown beiow has Hemophilia, an X-linked recessive disorder. If this couple had a son,…

A: ANS- If the father has hemophilia and the mother does not carry hemophilic gene, then no son (XY)…

Q: 1. Martha has type AB blood and is married to Richard who has type B blood. Richard's mother has…

A: ABO Blood Grouping in humans is controlled by gene ‘I’ which have three alleles IA, IB and i. IA and…

Q: 2. Cross a Blue Parakeet (BByy) With a Green Parakeet (BBYY). What is the genotype and phenotype of…

A: Feather color in parakeets is controlled by two genes. Blue color (B) is dominant over the absence…

Q: III. Write TRUE if the statement is correct and FALSE if otherwise. 7. A female parent possessing an…

A: 7. X linked dominant mutations will be expressed even when it is heterozygous. If the female parent…

Q: 7. If a woman with type A blood, whose mom had type O blood, is married to a man with type AB blood,…

A: DNA, or deoxyribonucleic acid, is the hereditary substance that contains the blueprints for all…

Q: 2. Mode of Inheritance:

A: Inheritance  In biology, inheritance is a process of transferring genetic material or information…

Q: When counseling parents about genetic transmission of an X-linked disorder, which concept does the…

A: The traits are estimated by the genes present on the sex chromosomes which are not different from…

Q: A man with blood type A and a women with blood type B have three children. A daughter with AB and…

A: The presence of antigen A and antigen B on the surface of the red blood cells determines the blood…

Q: 1.   How can I explain why a  woman  had a son with normal vision and normal blood clotting. If she…

A: Hemophilia A and hemophilia B are inherited in an X-linked recessive pattern. The genes associated…

Q: A normal woman who is a carrier for colorblindness marries a normal man. What types of offspring…

A: As colour blindness is an X linked recessive diseases.So, XcXc = Homozygous recessive female ,…

Q: What are the chances that their child will be: 1. a colour-blind male? 4. a normal male? 2. a colour…

A: Red-green colour blindness is a recessive, sex-linked trait meaning it  is passed from mothers to…

Q: 5. The following is a good example of a predisposing characteristic that makes a person more…

A: The predisposing factors are the factors which led into the certain kinds of problems the exposure…

Q: 13. Which of the following is true regarding X linked recessive traits? More males are affected than…

A: Sex chromosomes in most mammals including humans do not always form a homologous pair as seen in all…

Q: 3. Hemophilia is a sex linked trait that does not allow for blood clotting normally. It is a…

A: Hemophilia is the X chromosomes  link bleeding disorder which include among the rare diseases and…

Q: 3. Cross a man with type B heterozygous blood with a woman with type O blood. What are the possible…

A: Introduction :- A blood type is a type of blood classification based on the presence or absence of…

Q: 2. Woody Guthrie, who wrote This Land is Your Land, was heterozygous for Huntington's disease (Hh).…

A: The given data describes the genetic makeup of American singer and songwriter Woody Guthrie and his…

Q: What parental genotype will produce all blood types (A,B,O, & AB) in their four children

A: Blood is fluid connective tissue with plasma which is fluid matrix and it has no fibres. Red blood…

Q: . A girl has green-red CVD (colour vision deficiency) which is an X-linked recessive trait. What are…

A: There are two points of information which define the answer:- The offspring is a girl Disease's…

Q: 5. Adrenoleukodystrophy (ALD) is a rare, inherited metabolic disorder preventing the fatty covering…

A: Inheritance pattern is a type of pattern which evaluates how traits are passed from parental…

Q: 2. Applying: After completing your biology class, you feel like you better understand genetics. Then…

A: Introduction Autosomal dominant is a pattern of inheritance for a trait or disorder that is caused…

Q: Fill-in the blank A person who is heterozygous for sickle-cell anemia a. has the disease b. C. does…

A: Sickle cell anaemia is an autosomal recessive disease meaning two defective or mutated alleles are…

Q: 2. In dragons, having purple scales is an autosomal dominant condition. What are the possible…

A: The autosomal dominant trait is the inherited when one of the dominant allele is present on the…

Q: . Give an example of a phenotype and a gene or genes associated with it.

A: Given: Genetics is the branch of biology that deals with the study of heredity and variation. Father…

Q: 4. Cross a Male with hemophilia with a normal heterozygous female. What is the percentage of the…

A: A Punnett Square is a useful instrument that assists with the varieties and probabilities that can…

Q: 4. Chris and Emma are phenotypically normal but carriers for SCA (gene A). a. What are their…

A: Sickle cell anemia (SCA) is a genetic disorder that affects hemoglobin, the protein in red blood…

Q: 4. Two individuals who have type O blood get married. If they have a child, which of the following…

A: There are four main blood types or blood groups: A, B, AB, and O. The blood types are decided…

Q: 13. A man with type A blood has a child with type O blood. What is a likely (most expected) genotype…

A: The Bombay allele (hh genotype) is a rare mutation that prevents the expression of the ABO antigens…

Q: 1. Two normal visioned parents have a color-blind son. Give the genotype of both parents and the…

A: Colour blindness is a sex-linked recessive condition that causes a deficiency in one of the eye's…

Q: 1. An albino man whose parents are both normal marries a woman ome of whose parents is normal and…

A: Albinism is a autosomal recessive transmission pattern disease. Suppose the genotype of Albino is aa…

Q: Hemophilia is a blood clotting disorder. It is a X linked recessive trait. A female with hemophilia…

A: Haemophilia is X linked recessive disorder in which recessive allele ( h ) that present on X…

Q: 7. Take a look at the following families and decide if the trait is autosomal dominant, autosomal…

A: The functional unit of chromosome that transcribes into protein is called gene. And genetic…

Q: 8. Which of the following is true given a mating between a woman who is a carrier for color…

A: 4) This couple could have a color blind son.

Q: 10. There are two allelic variants of IGF2. One is 40 kilodaltons (kD) and the second is 50 kD, and…

A: IGF2 or Insulin-like Growth Factor 2 gene is the gene that is responsible for the production of a…

Q: Dierentiate between the following: a)dominant and recessive b)gene and allele c)homozygous and…

A: Genetics is the study of genes and heredity in general.

Q: ABO blood groups, an autosomal trait, in Humans are genetically determined. A woman with type O…

A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…

Q: 1. Two people with wavy hair have a straight-haired child. Wavy hair is a dominant. What are the…

A: According to the premise of the question wavy hair is dominant over straight hair. Since, the child…

Q: Muscular dystrophy is an x linked recessive disorder. If two of the four offsprings have muscular…

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

Q: 1. Red-green colorblindness is caused by a recessive allele (X) at an X-linked gene, and albinism is…

A: The most prevalent type is red-green colour blindness, followed by blue-yellow colour blindness and…

Q: 4. Cross a yellow parakeet (bbYy) with a white parakeet. What is the genotype of and phenotype of…

A: * Given that yellow parakeet has genotype bbYy . * So the white parakeet genotype will be BBYy. *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.