In humans, color vision depends on genes encoding three pigments. The R (red pigment) and G (green pigment) genes are close together on the X chromosome, whereas the B (blue pigment) gene is autosomal. A recessive mutation in any one of these genes can cause color blindness. Suppose that a color-blind man married a woman with normal color vision. The four sons from this marriage were color-blind, and the five daughters were normal. Specify the most likely genotypes of both parents and their children, explaining your reasoning. (A pedigree drawing will probably be helpful.) (Problem 50 is by Rosemary Redfield.)

Q: The mode of inheritance of the auricular hypertrichous trait in the Brown family is clearly an…

A: A genetic disorder known as auricular hypertrichosis manifests as strong, long hairs emerging from…

Q: Regarding Mendelian inheritance in diploid individuals, (Read each statement carefully. Select all…

A: Ploidy is a term which describe the number of sets of chromosomes in a cell. The term haploid…

Q: Glucose-6-phosphate dehydrogenase deficiency (G6PD) is inherited as an X-linked recessive gene in…

A: Glucose 6-phosphate dehydrogenase deficiency is inherited as an X-linked recessive gene. Woman has…

Q: heterozygous condition results in a color known as tortoise shell, with both alleles expressed. This…

A: Answers:    In cats, yellow color is due to one allele, and black color is due to another allele.…

Q: Geneticists are concerned about three different genetic conditions present within their family.…

A: Autosomal dominant A = achondroplasia  a = average height  AA and Aa = affected aa = normal    X…

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: A woman knows that her mother is a carrier of Kartagener’s syndrome (an autosomal recessive…

A:

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: Table 8.1 shows that Turner syndrome occurs when an individual inherits one X chromosome but lacks a…

A: Chromosomal deletion syndrome occurs when whole or part of chromosomes are missing. Turner Syndrome…

Q: Ichthyosis is a rare X-linked recessive disorder that is characterized by scaling of the skin around…

A: Note- we are supposed to answer 3 subpart of a question according to our guidelines. So please…

Q: The gene for polydactyly (P) is autosomal and dominant to normal fingers (p). Hemophilia is…

A: Genes are specific regions in the DNA that code for specific proteins. The genetic instructions…

Q: The orange coat color allele in cats is located on the X chromosome and is one of two genes…

A: The two variants of coat color found in cats are orange and black. The alleles responsible for these…

Q: Pompe disease is a glycogen storage disorder caused by a lack of a-glucosidase, the enzyme that…

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

Q: Amelogenesis imperfecta (AI) is a disorder of faulty tooth enamel formation. It is inherited in an…

A: Genes are the unit of inheritance that transfers traits from one generation to another. Genes coding…

Q: Colorblindness and hemophilia are both X-linked traits in humans. Explain how a female who has a…

A: Colourblindness and haemophilia are both X-linked traits in humans. Haemophilia is a bleeding…

Q: 1 In humans, red-green colorblindness is a sex-linked recessive condition. Show a cross between a…

A: Note - Since you have asked multiple questions, we will solve the first question for you. If you…

Q: Ichthyosis is a rare X-linked recessive disorder that is characterized by scaling of the skin around…

A: The term "X-related recessive disease" is used to define as to a mutation in the X chromosome's…

Q: Prader-Willi Syndrome (PWS) is caused by a mutation in an autosomal gene that is maternally…

A: Given information Prader-Willi Syndrome occurs by the mutated autosomal gene that is maternally…

Q: The gene causing Coffin-Lowry syndrome (OMIM 303600) was recently identified and mapped on the human…

A: Males and females of a species have separate sex chromosomes. The number of copies of seX-linked…

Q: Color blindness is caused by an X-linked recessive allele that is rare in humans. Suppose two…

A: Color blindness is an X linked recessive disease meaning mutation in two of the X chromosomes would…

Q: Piebaldism is a skin condition that causes an infant to be born with white birthmarks due to a…

A: It is an autosomal dominant genetic disorder. It is mainly due to the absence of melanocytes of the…

Q: In cells with more than one X chromosome, one X chromosome is inactivated. The opsin1 gene is on the…

A: In individuals with two X chromosomes, a phenomenon known as X chromosome inactivation occurs,…

Q: An autosomal recessive form of deafness is caused by a mutation in the ESPN gene (E = dominant…

A: Prior to ascertaining the accurate depiction of Gianna's metaphase I cell, it is essential to…

Q: 1. A) Apply the concept of sex linkage to explain why color blindness is more prevalent in men than…

A: Sex linkage In genetics, it refers to traits that are affected by the sex chromosome-carried genes.…

Q: In humans, dark hair (D) is dominant over blondness (d), and color blindness (c) is a sex-linked…

A: The probability that a colorblind son has dark hair is determined by the gene combinations of his…

Q: Red–green color blindness is caused by an X-linked recessive genetic defect. Hence females rarely…

A: The retina of humans contains 2 kinds of cells that are rod cells and cone cells. There are 3 kinds…

Q: Colorblindness is an X-linked trait found in humans. What are the chances that a colorblind man will…

A: Colorblindness is a recessive disorder located on the X chromosome. Since, it is recessive, two…

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.