Q: Suppose that a female with the mutation (i.e., a heterozygous female) mates with a healthy male (the…
A: Alleles are the alternative forms of a gene that are located on the same locus of a homologous…
Q: Distinguish between penetrance and expressivity.
A: Gregor Mendel is known as the Father of genetics and he discovered that traits/ characters are…
Q: Name the type of gene , which in the presence of contrasting allele is not expressed.
A: If we cross two homozygous parents - the offspring will always show the trait which is dominant.…
Q: What is the degree of intensity with which a particular genotype is expressed in a phenotype?
A: The expressivity is the degree of intensity with which a particular genotype is expressed in the…
Q: Explain the difference between variable penetrance and variable expressivity.
A: Penetrance alludes to the likelihood of a quality or attribute being communicated. Sometimes,…
Q: In ___________ heterogeneity, a variety of mutations in a singlegene cause disease. Compound…
A: The genetic heterogeneity occurs through the production of single or similar phenotypes through…
Q: For genes that are close together, the frequencies ofcotransformation or cotransduction are…
A: Transduction is the process by which foreign DNA is introduced into a cell by a virus or viral…
Q: Give at least 3 examples each of internal and external factors that affect penetrance and…
A: Penetrance is a term used to define whether or not a genotype has a clinical expression in a person.…
Q: Describe how Morgan's results deviated from Mendalian inheritance and led to the dicovery of a new…
A: Sir Gregor Mendel, in 1865, put forward some principles of heredity, which are popularly known as…
Q: Sover between genes a and E
A: Introduction By adding a third quality, we currently have a few distinct sorts of getting over…
Q: Define mutant allele
A: The genome of an organism consists of the genetic information that is inherited by its offsprings.…
Q: Provide a proof that a different phenotype can be produced from the same genotype. What are the…
A: A phenotype is a set of observable characteristics about a person, such as height, eye colour, and…
Q: Explain complete and incomplete penetrance and give an example
A: Penetrance is basically the probability of the gene or the trait of being expressed. Despite the…
Q: A family is tested for spinal muscular atrophy, an autosomal recessive disease, using RFLP. The…
A: Given: Spinal muscular atrophy - an autosomal recessive disease (aa) Carrier for spinal muscular…
Q: Albright syndrome is caused by a mutation in a gene that is imprinted. A is the wild-type allele and…
A: AbstractThe disease results from somatic mutations of the GNAS gene, specifically mutations in the…
Q: Determine the justification for variation in the phenotypic expression of MERRF in identical twins.
A: Myoclonus Epilepsy with Ragged-Red Fibers Syndrome, often known as MERRF, affects the neurological…
Q: Explain the consequences of a translocation or an inversion.
A: Translocation: In this, a part of the chromosome is broken and may be joined with non homologous…
Q: diploid individual with two identical alleles for a particular gene is said to be: a. homozygous…
A: An allele is a variant form of a gene. An organism that has two different alleles of the gene is…
Q: Define about random monoallelic expression ?
A: Genes are carriers of hereditary in organisms. A gene is a DNA sequences having two alleles in it…
Q: Determine the correspondence of the gene X and gene Y to the mutant gene causing Trp-phenotype
A: An organism's genotype is influenced by its genome as well as by its environment. The physical…
Q: A pattern of inheritance in which the form of a single trait is collectively determined by alleles…
A: Alleles are the variant form of a gene controlling a single trait. Usually, one gene controls one…
Q: define the term derived allele
A: Genetics is the branch of biology, which deals with the study of genes, their pattern of…
Q: How mutant enzymes could cause variation in many phenotypictraits ?
A: The mutation is the sudden deleterious effects in the DNA sequences, they can arise when the DNA is…
Q: Explain why small deletions and duplications are less likely tohave a detrimental effect on an…
A: A mutation is a permanent change in the DNA of a cell such that the sequence deviates from what is…
Q: The following image shows Nondisjunction. Which of the following cells will suffer from a genetic…
A: Nondisjunction is a failure of chromosomes to separate during cell division. This results in the…
Q: Difference between inheritense of one gene and inheritence of two gene?
A: INHERITANCE - we all poses some similarities with our parents because we inherit some of their…
Q: What are factors that alter the phenotypic expression of genotype?
A: Genotype The genotype can be defined as the genetic make-up of an individual organism. Our genotype…
Q: Complete the table below to describe the phenotypic consequences for a loss-of-function allele and…
A: During the development of cancer two genes are contributed that are; proto-oncogene and…
Q: With regard to pedigree analysis, make a list of observations thatdistinguish recessive, dominant,…
A: Pedigree analysis is a diagrammatic representation used to determine the mode of inheritance of…
Q: Genes on one gene that affect the expression of genes at different locations are said to be alleles…
A: Some genes are independent and some affect other genes.
Q: Hydrangeas are plants whose flowers change colour according the pH of the soil. Four cuttings were…
A: 1.Hydra gear are the unique type of plants to indicate the pH of the soil. 2.Actually, the blooms of…
Q: In which of the following does one gene control the expression of another, independently inherited…
A: The heredity basic physical and functional unit is called a gene. They are formed from the DNA…
Q: Differentiate between parental ditype (PD), nonparental ditype (NPD), and tetra type (T).
A: The spores are the meiotic products of a yeast. They remain packed in the parent cell to form a…
Q: Define locus heterogeneity, and explain how it can confound pedigree analysis.
A: The study of genetic variations, heredity, and genes is called genetics.
Q: Explain why linked genes do not exhibit independentassortment.
A: The alleles of two (or more) separate genes are sorted into gametes independently of one another,…
Q: When expressing X-linked recessive gene notation, how should the notation be written. Should I use…
A: X-linked recessive inheritance is a type of inheritance in which a mutation in a gene on the X…
Q: Give the genetype t phenstype of the offspring,
A: Method:- The method done with the pencil is not the most accurate way to draw a Punnet Square.…
Q: Albright syndrome is caused by a mutation in a gene that is imprinted. A is the wild-type allele and…
A: Given: A pedigree. Albright syndrome is caused by a mutation in a gene that is imprinted. A - Wild…
Q: Give biological term for supressed allele.
A: The presence of two alternative forms/variations is one of the defining features of a single gene…
Q: What is one-way genetic background can affect phenotypic expression?
A: Phenotypes are the characteristic traits expressed by an individual. Whereas genotype is the genetic…
Q: Give examples of environmental factors that affect phenotype byaltering gene expression
A: Introduction Environment plays a major role in the diversification of organisms. For example, if we…
Q: explain Phenotypic consequences of deletion
A: Chromosomal aberrations are changes in the number and arrangement of genes in the chromosomes. They…
Q: Differentiate between parental ditype (PD), nonparentalditype (NPD), and tetratype (T).
A: Genetics is a branch of science that deals in the study of genes, heredity, and genetic variation of…
Q: a) Which two genes are linked? Show or explain how you know. b) How far apart are those genes?
A: …
Q: Briefly describe what is a meaning of genetic variation.
A: Variation are distinctive changes that takes place in individuals or set / group of individuals . It…
Contrast penetrance and expressivity as the terms relate to
expression.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- What some ways that incomplete penetrance can occur? Give at least two possible ways on why it occurs.The following genotypes of two independently assorting autosomal genes determine coat color in rats:A-B- (gray); A-bb (yellow); aaB-(black); aabb (cream)A third gene pair on a separate autosome determines whetherany color will be produced. The CC and Cc genotypes allow coloraccording to the expression of the A and B alleles. However,the cc genotype results in albino rats regardless of the A and Balleles present. Determine the F1 phenotypic ratio of the followingcrosses: (a)AAbbCC * aaBBcc; (b) AaBBcc * AABbcc;(c) AaBbCc * AaBbcc.Why Phenotypes may show variations in penetrance and expressivity?
- Describe how traits can exhibit incomplete penetrance and vary in their expressivity.In drosophila, a recessive mutation (m-) of a maternal effect gene results in an abnormal phenotype wherein homozygous (m-m-) females produce eggs that cannot support embryonic development. Homozygous (m-m-) males, however, can still produce viable sperm. Using m+ to denote a normal gene, determine the genotypes and phenotypes of the F1s produce by a cross between a heterozygous female and a recessive male. From the offspring, backcross the recessive female with the paternal strain. 1. What are the genotypes and phenotypes of the F2s? 2. If m-m- females produce useless eggs, then how are m-m- produced?In drosophila, a recessive mutation (m-) of a maternal effect gene results in an abnormal phenotype wherein homozygous (m-m-) females produce eggs that cannot support embryonic development. Homozygous (m-m-) males, however, can still produce viable sperm. Using m+ to denote a normal gene, determine the genotypes and phenotypes of the F1s produce by a cross between a heterozygous female and a recessive male. From the offspring, backcross the recessive female with the paternal strain. What are the genotypes and phenotypes of the F2s? Show COMPLETE cross for both cases. If m-m- females produce useless eggs, then how are m-m- produced?
- A SNP marker is found linked to the cystic fibrosis gene. Cystic fibrosis is an autosomal recessive disease. A couple plans to have children together and both are carriers for the cystic fibrosis gene but do not have the disease themselves. They are both A1/A2 at the SNP and the A2 allele is linked with the allele causing cystic fibrosis. Assuming no crossing over between the SNP and the disease gene, what genotypes in the offspring could result that would cause cystic fibrosis? O A1-cf, A1 - cf O A2-cf, A2 - cf O A1 - CF, A1 - CF O A1 - CF, A2 - cfIn rats, the following genotypes of two independently assorting autosomal genes determine coat color: A-B- (gray) A-bb (yellow) aaB- (black) aabb (cream) A third gene pair on a separate autosome determines whether or not any color will be produced. The CC and Cc genotypes allow color according to the expression of the A and B alleles. However, the cc genotype results in albino rats regardless of the A and B alleles present. Determine the F1 phenotypic ratio of the following crosses: (a) AAbbCC * aaBBcc (b) AaBBCC * AABbcc (c) AaBbCc * AaBbcc (d) AaBBCc * AaBBCc (e) AABbCc * AABbcc.a. Mutations in gene “X” are responsible for breast cancer and can be inherited into the next progeny. In one such case, one affected male parent (a father) who had only one affected parent (can be either male or female) too came to a genetic counselor. Upon the testing recommended by the counselor, it has been found that that male parent’s child has a 50% risk of developing the cancer. Can you discuss the inheritance pattern of this disease for this male parent? In which Mendelian disorder, all the children of a mother (both of her alleles of a gene on X chromosome are pathogenic) could also be affected?