Down syndrome is: Trisomy of chromosome 12 Trisomy of chromosome 18 Trisomy of chromosome 13 O Trisomy of chromosome 21

Q: In the fruit fly Drosophila melanogaster, a recessive condition called eyeless (ey) significantly…

A: First draw all the possible gametes for both the gametes. All gametes means all, including the…

Q: Explain the causes of familial Down syndrome.  How does it differ from Down syndrome due to…

A: Down syndrome is a disorder in which individuals have an extra copy of chromosome 21 instead of two…

Q: Cross C: Homozygote wild type flies (+/+) were crossed with white eye flies. for the F1 and F2…

A:

Q: Why is Trisomy 21 more common than other trisomies (e.g. Trisomy 1, Trisomy 2, etc.)? The size of…

A: Answer :-(C)   Trisomy 21 are caused by nondisjunction, which occurs when pairs of homologous…

Q: For the following chromosome complements, what is the phenotypic sex of a person who has Q. XO with…

A: The male sex-determining gene in human is termed as the sex determining region Y (SRY) gene.…

Q: which genetic disorder matches below descriptions. extra 21st chromosome attaches to chromosome 14.…

A: Genetic disorder is defined as the disease caused by the abnormality in the genome of an organism.…

Q: Describe some syndromes that result from chromosomal nondisjunction?

A: Nondisjunction of chromosome: - During cell division, it is the failure of separation of homologous…

Q: Define trisomy 16.

A: Chromosome disorders are non-inheritable abnormalities in which individuals possess either extra or…

Q: Lois and Peter, who are each NOT trisomic for chromosome 21, are awaiting the birth of a 2nd child…

A: *Given that Lois and Peter are not trisomic for chromosome 21. * The probability of Down syndrome is…

Q: Explain how nondisjunction can cause monosomy andtrisomy aneuploidy.

A: Failure of separation of Chromosome during nuclear division causes non disjunction

Q: Explain how nondisjunction produces monosomy and trisomy chromosomeconditions.

A: Mitosis: A type of cell division in which parent cell gives rise to 2 identical daughter cells with…

Q: Explain how an individual can have Down's Syndrome, and a karyotype that reveals 46 chromosomes.…

A: A genetic disorder is a condition that is caused in whole or in part by a deviation from the…

Q: A color-blind woman with Turner syndrome (XO) has a father who is color blind. Given that the gene…

A: Given that the gene for the color-blind condition is recessive and X-linked and a color-blind woman…

Q: How many Barr bodies are contained within the nucleus of a person with Monosomy X? In the nucleus of…

A: Introduction:- The X chromosome is shared by both males and females. Female somatic cells do not…

Q: Draw a Punnett square for the dihybrid cross. There are two known alleles of gene occupying a…

A: Dihybrid cross involves two genes in a cross. That's why the two traits are involved in this cross.

Q: Examine the following pedigree: O X-linked dominant Autosomal recessive What is the mode of…

A: Pedigree analysis helps us to understand the mode of inheritance of a particular disease that are…

Q: Could the pedigree in Figure 2-31 be explained as an autosomal dominant disorder? Explain.

A: The genetic and phenotypic traits being passed from one generation to the other are called…

Q: This is a typical pedigree for a family that carries neurofibromatosis. Is individual I-2 most…

A: Pedigree analysis can help to determine genotypes, identify phenotypes, and predict how a trait will…

Q: why Autosomal Aneuploidy Is Usually Lethal?

A: Autosomal monosomies are always fatal in, humans. The Presence of low dosage of proteins embryos…

Q: A phenotypically normal individual has the following combinations of normal and abnormal…

A: Chromosomal deletion is simply deletion of the part of the chromosome. Chromosomal inversion is a…

Q: II 4 5 II 1 2 3 4 5 6 7 IV 1 2 3 4 5 6 7 8 9

A: In the given pedigree, the trait skips generation, i.e., the trait appeared in the first generation…

Q: Draw a diploid cell heterozygous for genes a, b, c. Genes a,b,c are linked and autosomal.

A: Genes are hereditary units present on the chromosomes. A gene has two allelic variants. These…

Q: List some syndromes that result from inheritance of anabnormal sex chromosome number

A: Sexual defects in chromosomes are sex-specific. Normal males inherit a chromosome of X and Y, while…

Q: For the following chromosome complements, what is the phenotypic sex of a person who has Q. XX with…

A: The sex-determining region Y (SRY) is located on the short branch of the Y chromosome, which…

Q: Predict phenotypes associated with nondisjunctionof sex chromosomes.

A: Chromosome is a compact structure of a DNA molecule wrapped around some proteins. It is generally…

Q: Syndrome: ?? Number of autosomes and sex chromosomes: 45 Classification of abnormality: Numerical…

A: The abnormality in a chromosome is called chromosome abnormality. The male and flame contribute an…

Q: Determine the most likely mode of inheritance for the following pedigree: Question 5 options:…

A: Every human is made up of millions of cells. Cells are the basic structural and functional units of…

Q: The X and Y chromosome will not be the same size. What are the implications of this with respect to…

A: Most Y chromosomes do not undergo standard recombination. But .there is a single obligatory…

Q: Kelly and Sam are both unaffected carriers for two autosomal recessive disorders, PKU (chromosome…

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

Q: Assume that color blindness is a recessive character on the X chromosome. A man and woman with…

A: Introduction  Inheritance referred to the transmission of character/traits in the form of gene from…

Q: Consider the following pedigree, which traces the inheritance of a single-gene hereditary disease.…

A: Single gene herediary diseases are mainly caused by a change of any one gene in a particular DNA.Its…

Q: major factors contributing to the clinical consequences of structural chromosome abnormalities

A: There are three main categories of genetic disorders: chromosomal abnormalities - These types of…

Q: Part C is actually 13 chromosomes in a cell of a pea plant that is monosomic for a single…

A: Chromosomal abnormality is a condition in which there is alterations in chromosome number and…

Q: aneuploidies in autosomal chromosomes likely to cause more severe phenotypes compared to…

A: Chromosomal abnormality or alteration is a change in the sequence of the chromosome. These…

Q: Extranuclear inheritance can involve genes that are present in:     ribosomes   mitochondria…

A: Extra nuclear inheritance is also known as cytoplasmic inheritance. Extra nuclear inheritance is…

Q: describe the Idiogram of the human Y chromosome

A: Chromosomes are the carrier of genetic material deoxyribonucleic acid (DNA). They are coiled in…

Q: The following letters indicate the pairs of alleles present on a homologous chromosome pair within…

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

Q: Sue's chromosome #18 pair looks like this: Bob's chromosome #18 pair looks like this: Bob and Sue…

A: In non disjunction, there is failure in separation of chromatid. This non disjunction can cause…

Q: all of his sons   all of his daughters   half of his daughters and half of his sons   half of his…

A: X- inactivation or lyonization is a process in which one of the X- chromosome is inactivated in…

Q: In Anaphase 1 homologous chromosomes are separated from each other resulting in intermediate cells…

A: In anaphase 1 the homologous chromosomes separate from each other resulting in intermediate cells of…

Q: Assume that color blindness is a recessive character on the X chromosome. A man and woman with…

A: Colorblindness is a sex linked disease in which the X chromosome is affected. In this type of…

Q: While working in the lab, you notice that your fruit flies all appear to have an intersex phenotype.…

A: The intersex phenotype in fruit flies is determined by the ratio of X chromosomes to the autosomes…

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.