A man with a pointed nose and a woman with a round nose have a daughter with a round nose. This daughter has Turner Syndrome (genotype XO: one X chromosome). Nondisjunction must have occurred in melosis 2 of the mother More than one of the answers is correct Nondisjunction must have occurred in meiosis 1 of the father Nondisjunction must have occurred in meiosis 1 of the mother Nondisjunction must have occurred in meiosis 2 of the father

Q: A heterozygous free-lobed man is mated to a heterozygous free-lobed woman. What are the genotypes…

A: Genotype is the genetic makeup of an organism.  It consists of 2 alleles in an individual.

Q: The picture below represents a G1 cell from a newly discovered species that uses the X/Y sex…

A: The cell is in G1 phase and hence it undergoes the S phase to duplicate the DNA. Thus, homologous…

Q: On average, what proportion of the genome in the following pairs of humans would be exactly the same…

A: Meiosis is a cell division through which gametes are produced. One diploid eukaryotic cell divides…

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

A:

Q: On average, what proportion of the genome in the following pairs of humans would be exactly the same…

A: Chromosomes are carrier of deoxyribonucleic acid (DNA). DNA is the genetic material. Each cell has…

Q: Red-green color blindness is an X-linked recessive disorder.  If Allison is heterozygous (a…

A: Introduction: Color blindness is an inherited sex-linked disorder that affects the  ability of…

Q: Given that the gene for the color-blind condition is recessive and X-linked. You have a female with…

A: Maternal parent has a nondisjunction at Meiosis1 or 2

Q: A parent has the genotype PpLl for two independently assorting genes. What are all the possible…

A: According to Mendel's independent assortment law, the parent who has the genotype PpLl for two…

Q: age Individuals who carry stable pericentric inversions are typically phenotypically normal, but…

A: A pericentric inversion is a kind of chromosomal rearrangement in which a portion of a chromosome is…

Q: A dominant allele, XE, carried on the X chromosome causes the formation of faulty tooth enamel,…

A: The genotype of a child is dependant on the genotype of the parents. A dominant allele can manifest…

Q: In beetles, an X-linked gene determines body size, with normal size (M)completely dominant to…

A: A genetic cross is an experimental breeding process performed to understand the patterns of…

Q: The bald phenotype which is due to a dominant autosomal gene the expression of which is sex…

A: Sex influenced trait are the traits that are controlled by sex chromosome but are exhibited on the…

Q: Anhidrotic dysplasia (lack of sweat glands) is caused by loss-of-function of an X-linked gene. It is…

A: The female can be mosaic in nature. Because of presence of two X chromosomes. The one X chromosomes…

Q: Describe how nondisjunction results in aneuploidy disorders, and describe the syndrome/ symptoms/…

A: Nondisjunction means the failure of homologous chromosomes or sister chromatids to separate during…

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: Duchenne muscular dystrophy (DMD), marked by muscular degeneration, results from an X- linked…

A: Duchenne muscular dystrophy is a X- linked inherited disease which is characterized by degeneration…

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: 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: On average, what proportion of the genome in the following pairs of humans would be exactly the same…

A: Every living species have two types of cells, somatic cells (diploid) which are responsible for…

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: Determine whether the chromosomes are most difficult to segregate properly during meiosis in Down…

A: Introduction Trisomy is a type of aneuploidy. In trisomy, we find three copies of chromosomes…

Q: In humans, blue eyes are inherited as a recessive autosomal trait and color blindness is an X-linked…

A: The objective of this question is to determine the probability of this couple having a son with…

Q: The pedigree below shows a family where several members (filled boxes) are affected with a genetic…

A: Pedigree : Pedigree analysis is a graph that depicts a family tree and shows which family members…

Q: Primary oocytes in females are O dipoid and undergo mitosis O dplcid and undergo meiosis O haploid…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Duchenne Muscular Dystrophy is an X-linked recessive disease. A couple is wanting to have a child.…

A: Duchenne muscular dystrophy is the most common childhood form of the disease; it occurs in one of…

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: Define nondisjunction and explain how it causes aneuploidy. Name two syndromes resulting from…

A: The chromosome is the package of densely packed chromatin fibers with DNA and histone proteins. In…

Q: A) Calculate the map distance separating the three genes B) Which gene is in the middle?

A: Symbol  white eyes = r short wings = l  ebony bodies = g    red eyes = R long wings = L  Gray bodies…

Q: Duchenne muscular dystrophy is a recessive disorder caused by a rare,loss-of-function allele that is…

A: Duchenne muscular dystrophy (DMD) is a quickly progressive type of muscular dystrophy that happens…

Q: A Calico cat (orange and black striped fur) is born with Klinefelter syndrome (XOXBY) from parents…

A: When a male is born with an extra copy of the X chromosome, he is diagnosed with Klinefelter…

Q: In C. elegans, lon-2 and unc-2 are recessive mutations that are 8 map units apart on the X…

A: A map unit is defined as the distance between two linked gene pairs where 1% of the products of…

Q: The pedigree above shows inheritance of inability to taste PTC (shaded individuals cannot taste it),…

A: The given pedigree shows presence of affected child (III-5) from unaffected parents (II-5 and II-6).…

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: These circles represent cells. The first cell is going through meiosis, and the 2 meiotic divisions…

A: One cell (parent) splits into two or more offspring (daughter cells) is referred to as cell…

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…

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.