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: 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: 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: Draw a simple sketch illustrating how nondisjunction in meiosis can lead to Down syndrome.

A: To draw: A simple sketch illustrating how nondisjunction in meiosis can lead to Down syndrome

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: A certain plant species has dominant red flower color (R) to the recessive white flower color (r). A…

A: Introduction Inheritance is the process of transmitting traits from parent to offspring. The traits…

Q: Imagine a germ cell for an animal that is 2n=4. Gene A and B are found on chromosome one, and the…

A: Meiosis is the cell division process that is responsible for the production of four haploid (n)…

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: 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: EXAMPLE 2: The parents in the family above produce another son, this time with two Y chromosomes and…

A: Non disjunction is a event where either homologous chromosomes in meiosis I or sister chromatids in…

Q: In a diploid organism, two homologous chromosomes synapse at prophase 1 of meiosis.  One of the…

A: Crossing over is the process in which the exchange of genetic material takes place in a cell during…

Q: The following Pedigree shows an unknown genetic disorder. The disorder is believed to be caused by…

A: In terms of genetics, a pedigree is a diagram demonstrating the manner in which a trait or medical…

Q: an unaffected woman who is heterozygous for the x linked allele causing duchenne muscular dystrophy…

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

Q: A woman with a balanced reciprocal translocation of Chromosomes 4 and 20 (karyotype, right panel…

A: In a balanced reciprocal translocation genetic material is exchanged between two chromosomes with no…

Q: In the cross between a female AaBbccDdee and male AabbCcDdee, what proportion of the progeny are…

A: In this type of genetic cross, each gene is crossed separately and probability of the desired…

Q: None

A: Genotype and Phenotype of Parents:Male (osk-/osk-): This male has two mutant alleles of the oskar…

Q: Identify the four possible gametes produced by the following individuals (Y = yellow, y = blue, S =…

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

Q: Draw a Punnett square for the dihybrid cross described below (it is the same story as given for…

A: X linked characters are those where the the gene in question is located on the X chromosome. Females…

Q: In 1965 a faulty study was performed, which suggested that the XYY karyotype was associated with…

A: XYY karyotype - Males with XYY syndrome have 47 chromosomes because of the extra Y chromosome. This…

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: 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 wobble bats coat color is determined by a single gene. A black coat is dominant to a brown coat…

A: Answer : The alleles ahoul be  B- black , b- brown The genotype of a homozygous black coated wobble…

Q: Consider an individual with the AB/ab genotype, and assume that alleles of the A and B genes are…

A: A fundamental concept in these analyses is the genotype of the individuals involved in the cross,…

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.