Q: an human is born with 45 chromosomes, what type of mutation occurred within this individual?
A: Human beings have 22 pairs of autosomal chromosomes and 1 pair of sexual chromosomes. Autosomes…
Q: The BCRA-1 allele is associated with very high risk of breast and ovarian cancers. Is this allele…
A: The mutation accumulation (MA) theory describes that if harmful or deleterious mutations are…
Q: If a woman is a carrier of a certain x linked disease and one of her X chromosomes is turned off in…
A: As according to the above question; women is a carrier of Certain X linked disease.for example ;…
Q: Explain why the nucleotide sequence of the same gene that you inherited from your mother and father…
A: we inherit two copies of each chromosome—one copy from your mom and one copy from your dad. This…
Q: What are twins?Genetically what are the twotypes of twins that can begenerated?
A: Pregnancy is also termed as gestation during which one or more offspring develop in the uterus of a…
Q: Red–green color blindness in humans is due to an X-linked recessive gene. A woman whose father is…
A: X linked recessive inheritance is a condition where defective gene is located on X chromosome.…
Q: Why does mitochondrial DNA come only from your mother?
A: Deoxyribonucleic acid (DNA) is a double stranded helical genetic material containing thousands of…
Q: What is the difference between X and y chromosomes and how to they effect genetics?
A: X and Y chromosomes serve as the basis for sexual differentiation. They are primarily the sex…
Q: If children obtain half of their Gene's from one parent and half from the other parent, why aren't…
A: A genome of offspring is inherited from both the parents. Half of the genetic material is inherited…
Q: Can you explain the difference between genotype and phenotypes?
A: The alternate forms of gene are referred as allele. An allele determines the hereditary…
Q: Explain how, by genetic drift, a certain version of the human Y chromosome might become extinct.
A: Y chromosome is the male determining factor in humans. A normal human has 22 pairs of autosomes and…
Q: If children obtain half their genes from one parent andhalf from the other parent, why aren’t…
A: Genetics is a branch of biology that is concerned with the study of Nucleic acids (Ribonucleic acid…
Q: Most mutations in a diploid organism are recessive. Why?
A: To describe: Why most mutations in a diploid organism are recessive.
Q: The various forms of any one gene are called? A. homologous B. homozygous C. Heterozygous D.…
A: Heredity: The transmission of the genes from the parents to the offspring or from one generation to…
Q: Why mitochondrial DNA is inherited from mother only in contrast with nuclear DNA which inherited…
A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…
Q: In a sample of 1000 patients with Down syndrome, a geneticist discovers that 95% of them are…
A: Trisomy is a kind of polysomy in which three instances of a particular chromosome occurs. Generally…
Q: What do you mean by homozygous condition for a gene?
A: Crossing over is defined as the process of exchange of chromosomal segments between the no sister…
Q: How many copies of a gene does the other parent contribute to each of the offspring?
A: Genes are responsible for the expression of traits. If genes have multiple copies, they are referred…
Q: Why do gene mutations not result in chromosomal mutations?
A: Answer: Introduction: Mutation- These are the random heritable changes that occurs in the DNA…
Q: Why are most genetic diseases caused by recessive alleles?
A: Recessive alleles disorder:-
Q: Locus heterogeneity means that a genetic disordera. has a heterogeneous phenotype.b. is caused by…
A: The correct answer is (a) has a heterogeneous phenotype.
Q: The karyotype consists of the number and structure of the chromosomes.How do changes in the…
A: A karyotype is the complete set of chromosomes of an individual which helps in identifying…
Q: In a trisomic individual, such as a person with trisomy 21 (Down syndrome),a genetic imbalance…
A: Trisomy 21 is a common genetic defect that is caused by chromosomal abnormalities. Trisomy 21 refers…
Q: Edwards Syndrome is a genetic condition in which a person has three copies of chromosome 18. This…
A: Ans. Edward syndromes (which are referred to as trisomy 18), are a syndrome of chromosome defects…
Q: What occurs if the same genes are linked on the same chromosome ?
A: DNA, or deoxyribonucleic acid, is a form of nucleic acid found in the cell's nucleus. It is a…
Q: Will insurance companies be able to deny coverage or even treatment of illnesses that can now be…
A: The term insurance coverage refers to the amount of risk or liability covered by insurance services…
Q: How does the Chromosomal Theory of Inheritance helped to advance our understanding of genetics?
A: The Chromosomal Theory of Inheritance was founded in 1902 by Theodor Boveri and Walter Sutton. This…
Q: why are certain genes just expressed in the mother and not in the father or vice versa?
A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…
Q: A mutation on an autosome causes a particular protein to be overproduced, and the excess protein…
A: Mutations are random changes in the genome.
Q: This pedigree exhibits a maternal effect. What is the genotype of each individual?
A: Pedigree analysis is useful when identifyig any population when progeny data from several…
Q: How does the Chromosomal Theory of Inheritance help to advance our understanding of genetics?
A: The chromosomal theory of inheritance : The sperm cell and egg cell are produced by meiosis.…
Q: You find a person that has a new allele that is not found in DNA samples taken from skin cells of…
A: The sperm is produced from the father but the process of meiosis. The egg is produced from the…
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: Which mutation, if it occurred in an individual’s mother, could be passed on to her child?
A: The type of mutation which is passed on to the child from their parents is called a hereditary…
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: 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: A recent commercial for a biomedical company talked about a future in which every individual would…
A: Genotype: A genotype is individual information of genes. It is also referred to as the two alleles…
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 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: Why are the chromosomes replicating? Why is this necessary for the embryo?
A: The fundamental importance of chromosomes is that they contain DNA, or deoxyribonucleic acid, the…
Q: What happens when genes are close to each other in the same chromosome?
A: Chromosomes are the thread-like structures that appear during cell division.
Q: What does the X/Y pair of chromosomes determine in humans?
A: Chromosomes are DNA-carrying structures located in the center (nucleus) of cells. The substance that…
Q: Explain, at the molecular level, why human genetic diseases oftenfollow a simple Mendelian pattern…
A: Genes are the set of nucleotides present in a chromosome that encodes for particular information…
Q: Why do some genes express themselves later in life? Why not earlier? How many chromosomes in a human…
A: Some genes are expressed later and not earlier:Gene expression is defined as the process by which…
Q: Is polyploidy a mutation?
A: Polyploidy may be defined as the addition of multiple sets of chromosomes inside an organism which…
Q: What are two possible explanations for why the same genotype (DNA) can result in different…
A: Sir Gregor Mendel was a priest and a teacher who did the famous hybridization experiment on garden…
Q: how do you distinguish nuclear from extrachromosomal inheritance? Give a specific example.
A:
Q: Which changes in chromosome structure cause a change in thetotal amount of genetic material, and…
A: Chromosomal aberrations are changes in the number and arrangement of genes in the chromosomes. They…
Q: Which TWO chromosomal mutations usually happen without phenotypic consequences, but result in…
A: Mutation is a natural process which results in the sudden change of the DNA sequence which results…
Identical twins each carry the same genome, but over time, can develop different
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- A company that offers PGD terms an embryo “normal and healthy” if it has 46 chromosomes. Why is this statement misleading? , Two famous male actors had twins using a surrogate mother who carried two embryos that hadbeen fertilized in vitro, one with one man’s sperm and the other with the other man’s sperm. In terms of genetics, how closely are the babies, a boy and a girl, related to each other if they have different fathers?An individual comes into your genetics clinic to be tested for any anomalies. When looking at their karyotype, you notice they have three X chromosomes and a Y chromosome. What information would you be able to relay to this individual? O They have Turner syndrome, are genetically female, and have two Barr bodies per cell. O They have Klinefelter syndrome, are genetically female, and have two Barr bodies per cell. O They have Klinefelter syndrome, are genetically male, and have two Barr bodies per cell. O They have Klinefelter syndrome, are genetically male, and have three Barr bodies per cell. O They have Turner syndrome, are genetically male, and have three Barr bodies per cell.In man, muscular dystrophy is a condition in which the muscles waste away during early life and may result in a shorter life expectancy. It is due to a sex-linked, recessive gene. A certain couple has five children – three boys (ages 1yr, 3yrs, and 10yrs old) and two girls (ages 5yrs and 7yrs old). The oldest boy shows the symptoms of this disease. You are their family physician and they come to you for advice. What would you tell them about the chances of their other children developing the disease?
- Why do extra copies of genes sometimes cause drastic phenotypic effects?Suppose genetic analysis reveals a serious mutation in a gene in the green region of the left-hand copy of chromosome 9 in this individual. Where would you go look for another allele of this gene in this individual to see whether this individual is homozygous or heterozygous for this mutation?Trisomy 21 is a genetic disorder that occurs when a patient has three copies of chromosome 21 in each cell. Which mutation would MOST likely result in a similar phenotype as trisomy 21?
- Clark Kent and Lois Lane Kent are about to have a (Super) baby. As Superman, Clark possesses amazing traits, including heat-ray vision. Assume that this is: a) a dominant trait, and b) carried on the X chromosome. If Clark and Lois have a boy or a girl, what is the probability that they will possess their father's amazing abilities? (Remember: females have XX chromosomes, while males have XY chromosomes. The Y chromosome doesn’t carry any of the genes on the X chromosome). X H = Superman’s heat-ray vision allele on his X chromosome Y = Superman’s Y chromosome X h = Lois’s normal vision allele on her X chromosomeA common kind of red-green blindness in humans is caused by the presence of a sex-linked recessive gene c, whose normal allele is c+. Using these genes, what are the possible genotypes and their corresponding phenotypes in males and females? Can two colorblind parents produce a normal son? (b) A normal daughter? (c) Can two normal parents produce a colorblind son? (d) a colorblind daughter?THE MOST COMMON FORM OF ALBINISM, A TOTAL LACK OF SKIN PIGMENT, IS DUE TO A RARE RECESSIVE GENE LOCATED ON CHROMOSOME 11. TWO PARENTS ARE NORMALLY PIGMENTED, BUT EACH PARENT HAS AN ALBINO SIBLING. NO ONE ELSE IN THEIR FAMILY IS ALBINO GOING BACK AT LEAST TWO GENERATIONS. ASSUMING NO MUTATION, WHAT IS THE PROBABILITY THAT THIS COUPLE WILL HAVE AN ALBINO CHILD? (HINT: WHAT IS THE PROBABILITY THAT 1: THEY ARE BOTH CARRIERS AND 2: THEY BOTH PASS ON A RECESSIVE ALLELE TO THEIR CHILD?)
