Can it ever be proved that an animal is not a carrier of a recessive allele (that is, not a heterozygote for a given gene)? Explain.

Q: A young lady requested pre-marital genetic counselling because her sister had died in infancy of…

A: Gangliosidosis refers to a group of lipid storage illnesses caused by the buildup of lipids called…

Q: If a male bird that is heterozygous for a recessive Z-linked mutation is crossed to a wild type…

A: The condition where two identical genes are present in an individual for a particular character, is…

Q: Provide a proof that a different phenotype can be produced from the same genotype. What are the…

A: The collection of genes that make up a person's genotype is referred to as that person's genotype.…

Q: What sex ratio would you expect among the offspring of a cross between a normal mape mouse and a…

A: Sex ratio is defined as the ratio of males and females in the population. Generally in sexually…

Q: Most mutations in a diploid organism are recessive. Why?

A: To describe: Why most mutations in a diploid organism are recessive.

Q: As shown in the Punnett square below, one variety of deafness is caused by an autosomal recessive…

A: An autosomal recessive disorder is defined as a condition or state in which two copies of an…

Q: What is the Dominant and Recessive allele of the Double Muscling phenotype of a Belgian Blue beef…

A: *Double muscling is an inherited disease seen in cattle breeds. * But mostly seen only in  few…

Q: The pedigree below shows the inheritance of a human genetic disorder. Assuming full penetrance of…

A: The inheritance for the above pedigree could be X-Linked Recessive because the possibilities for…

Q: White eye color is a recessive sex-linked trait in fruit flies. If a whiteeyed Drosophila female is…

A: Genes are the hereditary unit of an organism. The DNA (deoxyribonucleic acid) forms the genes. DNA…

Q: In the following pedigree, is the disorder’s mode of inheritanceautosomal dominant, autosomal…

A: In this pedigree, affected individuals appear in every generation. There are no carriers shown in…

Q: Explain why genetic disorders caused by recessive alleles of X-linked genes appear more frequently…

A: In humans and other mammals, biological sex is determined by a pair of sex chromosomes: XY in males…

Q: Explain why most loss-of-function alleles (hypomorphic or amorphic) are recessive to wild-type…

A: Recessive mutations inactive the affected gene and lead to loss- of -function.recessive mutations…

Q: Among different species, does extranuclear inheritance always follow a maternal inheritance pattern?…

A: Yes, extranuclear inheritance invariably is contributed by the mother. In many organisms, certain…

Q: A female animal with genotype A/a ⋅ B/b is crossed with a double-recessive male (a/a ⋅ b/b). Their…

A: The inheritance doesn’t always follow patterns explained by mendelian laws. It is important to…

Q: For a certain gene in a diploid organism, eight units ofprotein product are needed for normal…

A: a.  We cannot expect the mutation to be recessive,it may rather be dominant.This is an example of a…

Q: . Researchers discovered recently that the sole functionof the SRY protein is to activate an…

A: There are various genetic disorders that develop due to anomalies in sex chromosomes. They normally…

Q: Which of the following is not a characteristic of X-linked recessive traits in humans?   a.…

A: X linked recessive is a condition caused due to recessive mutant genes located in X chromosomes. In…

Q: Explain why most loss-of-function alleles are recessive to wild-type, but some are incompletely…

A: An allele determines the hereditary characteristics. Most of the genes have two alleles, namely the…

Q: Tay-Sachs disease is caused by loss of function mutation in a gene on chromosome 15 that codes for…

A: Tay-Sachs disease is a rare inherited disorder and this is due to mutation occurring in HEX A gene…

Q: Another recessive mutation in Drosophila, ebony (e), is on anautosome (chromosome 3) and causes…

A: The scalloped wing phenotype is produced due to a recessive mutation in the X chromosome. The…

Q: an ypu answer ALL parts to this question Pigment of chicken feathers is regulated by two genes, the…

A: If an individual possesses the genotype of two similar alleles for the gene that determines a…

Q: Why do human sex-linked recessive traits typically show up in sons more than daughters? Hint:…

A: Sex linked Traits :  These are the traits associated with genes found on sex chromosomes.  For…

Q: How can we solve for a X-linked trait gene problem? . If a heterozygous parent (AB/ab) is…

A: In living organisms, the differences in the specific traits are due to the presence of two versions…

Q: Suppose gene B is X-linked and is embryonically lethal when homozygous or hemizygous recessive. A…

A: Let us first discuss the terms used in the question, Homozygous:- A condition when two copies of an…

Q: Vermillion eye color in Drosophila is a sex-linked recessive trait. What phenotype would be found in…

A:

Q: Based on his phenotype muggle, with the information provided, can we tell what Dudleys second allele…

A: Inheritance or heredity is passing-on one trait from the parents to the progeny by either asexual or…

Q: Identical twins each carry the same genome, but over time, can develop different phenotypes. How can…

A: Identical twins are formed as a result of the fertilization of a single egg. The zygote later splits…

Q: Blood groups in the human species are determined by three allele genes: IA, which determines group…

A: All the human beings including many primates have ABO blood grouping mechanism which was discovered…

Q: To determine whether radiation associated with the atomic bombings of Hiroshima and Nagasaki…

A: Mutations are changes that occur in the deoxyribonucleic acid (DNA) sequence, either due to mistakes…

Q: In humans, why is it that the mother determines whether her sons will get recessive sex-linked…

A: Human X and Y chromosomes determine the biological sex of a person. XX specifies female and XY…

Q: Recessive maternal effect genes are identified in flies (for example)when a phenotypically normal…

A: Drosophila is usually used for genetic studies in the laboratory. The phenotype of the offspring can…

Q: Are multiple alleles, lethal alleles, and epistasis common or rare in humans? Why?

A: Multiple alleles refer to the different alleles of a single gene. It can be one or more than one.…

Q: Can we tell what Dudleys second allele is? Why or why not?

A: Lets take 2 genes for the easy expressing magical ability. First trait for magic Dominant Trait -…

Q: Let’s suppose a recessive allele encodes a completely defective protein. If the functional allele is…

A: A pair of alleles is present in a gene and the allele that is able to produce its phenotype in the…

Q: Why amorphic alleles are usually recessive to wild-type alleles?

A: Step 1 Mutation can result in mutant alleles that no longer produce a similar type of active product…

Q: Why are phenotypes the product of both their genes and their environments?

A: 1) GENOTYPE- It is the set of genes that we have inherited from our parents and will pass on these…

Q: Why are there so few Y-linked traits in humans?

A: The study of genetic variations, heredity, and genes is called genetics.

Q: Why have geneticists used reverse genetics to study the genes involved in vertebrate development?…

A: Reverse genetics is an approach where the function of a gene is identified by analysing the…

Q: A cross between two heterozygous individuals in one gene resulted in one phenotype, explain?

A: Sir Gregor Mendel was a priest and a teacher who did the famous hybridization experiment on garden…

Q: In mice, dwarfism is caused by an X-linked recessive allele, and pink coat is caused by an autosomal…

A: According to the given question, In mice, dwarfism is caused by an X-linked recessive allele, and…

Q: Vermillion eye color in Drosophila sp. is a sex-linked recessive trait. What  phenotype would be…

A: Considering XvXV as  Vermilion eye coloured female the crossing is given as follows. The phenotype…

Q: What is the difference between duplicate recessive epistasis and recessive epistasis? Give an…

A: Epistasis is defined as the process of gene interaction in which one gene mask the phenotypic…

Q: What some ways that incomplete penetrance can occur? Give at least two possible ways on why it…

A: Penetrance refers to the proportion of people with a particular genetic change (such as a mutation…

Q: Can a human male be a carrier of red-green color blindness?

A: The most prevalent types of color blindness are genetic, meaning they are handed down from one…

Q: What is a genetic reason for the absence of Labrador-shaped dogs that are a wolf-like gray (agouti)…

A: The interaction between two genes, Agouti and Melanocortin-1 receptor ( MC1R) produces diverse…

Q: In goats, a beard is produced by an autosomal allele that is dominant in males and recessive in…

A: Inheritance is the process of transmitting the traits from parent to offspring. Traits of an…

Q: Are these alleles common or rare in humans?

A: Allele is a variant form of gene, humans can be diploid if they have 2 allele, with each allele…

Q: Define about Tay–Sachs Disease:The Molecular Basis of a Recessive Disorder in Humans ?

A: To produce disease, both genes in a pair must be faulty. Carriers are people who have only one…

Q: How is maternal inheritance different from the segregation Mendel observed for nuclear genes

A: The maternal inheritance is different from the segregation that Mendel observed for nuclear genes.…

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.