Sex-reversed females with XY were found to be missing SRY gene on their Y chromosomes, while sex-reversed males with XX were found to carry a portion of a Y chromosome that has the SRY gene. What can you conclude from these two cases? 1.Sex determination depends primarily on the combination of sex chromosomes and the presence of SRY gene.  2.X and Y chromosomes can’t pair up during meiosis because they are not true homologous chromosomes.  3.Nonreciprocal crossover could result in translocation of the SRY gene between X and Y chromosome. 4. The SRY gene has a key role to determine maleness.  5.The Y chromosome contains a gene that determine maleness.

Q: Trisomy 21, or Down syndrome, occurs when there is a normal diploid chromosomal complement but one…

A: Down's syndrome occurs due to an error at the time of gamete formation. As a result the gametes may…

Q: Chimpanzees, gorillas, and orangutans all have 48 chromosomes, whereas humans have 46. Human…

A: When a part of a chromosome breaks off and gets translocated to another chromosome, leading to…

Q: What is the evolutionary significance of meiosis? Include references to the work of Darwin and…

A: Evolutionary significance of meiosis: 1) Meiosis is the sources of the sexual reproduction. Sexually…

Q: 1. If the two sister chromatids are the same, how are they called? 2. Which specific parts exchanged…

A: Crossing over is an interaction that occurs among the homologous chromosomes which leads to high…

Q: If a set of chromosomes is one copy of each kind of chromosome, how many sets are in a human…

A: The formation of male and female gametes required meiotic cell division, in which the parent germ…

Q: a. The 2 daughter cells produced from meiosis I are IDENTICAL / UNIQUE (choose one) compared to each…

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

Q: Mendel's laws of segregation and independent assortment are based on the movement of chromosomes…

A: Mendel conducted the experiments on the garden peas. He chose some unique traits of peas and…

Q: An organism has two chromosomes only. Chromosome 1 has its centromere near one end and carries the…

A: Metaphase of Meiosis IHomologous chromosomes are paired up and aligned along the equator of the…

Q: You know that the male's genotype is X –Y; visualize chromosomes: Note there a. 2 traits that are…

A: Crossing over occurs at two levels:- 1) At chromosomal level hence known as chromosomal crossing…

Q: Name two ways that genetic diversity is increased during meiosis.

A: Hereditary variety is a proportion of the hereditary contrasts that exist inside a populace. The…

Q: 1. What are the different types of chromosomes? Draw and discuss each. 2. Discuss the following…

A: A biological process called the sex determination mechanism controls how an organism develops its…

Q: Stephanie conducts an experiment to study sex reversal in a specific grographic location. She…

A: Females are born with two X chromosomes. Female somatic cells are not involved in sexual…

Q: A report in the New England Journal of Medicine (Seminar et al. 2003) relayed a discovery about a…

A: Suppose, we have two gene a and A  a is carried the disease  Aa- carrier  AA- normal aa- affected…

Q: A. How many gamete classes would be formed from the following genotype: Tt Rr Ss Gg Yy?   B.…

A: To determine how many gamete classes would be formed from the genotype Tt Rr Ss Gg Yy, we can use…

Q: 1. Let's take the example of the gray kangaroo (Macropus fuliginosus) whose ploidy is 8 and the…

A: In this study, we are going examine the karyotype of the grey kangaroo (Macropus fuliginosus),…

Q: What are the haploid genotypes of the gametes and frequencies/proportions of those gametes that can…

A: Meiosis cell division is the process of generation of two daughter cells that are genetically…

Q: Who in the pedigree has the same Y chromosome as the II-3 male? Give all correct answers.

A: Pedigree shows the family history from generation to generation in the form of chart.  Square shows…

Q: meiosis，4 cells are produced and each cell are unique daughter cell.However isn‘t it true that…

A: Meiosis is a type of cell division which undergoes two successive devision. Meiosis 1st ( reduction…

Q: What is the difference between the X-Y and X-0 systems of sex determination?

A: The biological system that is known to determine the development of sexual characteristics is known…

Q: An individual inherits a set of translocated chromosomes (2 and 3) from one parent and a wild type…

A: For certain basic eukaryotes, such as yeast, meiosis is the method used for survival. Yeast…

Q: When crossing the mythical one-horned snail (Snaiun) you notice that blue (B) is dominant to…

A: Given: In one-horned snail: Blue - dominant - B and Green - recessive - b Long - dominant - L and…

Q: Q1: Is this the karyotype of a male or a female? Q2: How would the karyotype of a person with Down…

A: Karyotype is a diagrammatic representation of arrangement of chromosomes. It is helpful in…

Q: 1.) If the chromosome number in a sepematogonium is 24, what will be the chromosome number in each…

A: Spermatogenesis is the process of formation of spermatogonia from the germ cells present in the…

Q: Draw relevant schemes of karyotypes for a female with a classical Down syndrome (trisomy 21),…

A: Part-1) A female with down syndrome would typically have 47 chromosomes instead of the usual 46.…

Q: Please explain question 4  4. Red color vision is determined by a gene on the X chromosome (a…

A: The genes that are responsible for causing red-green color blindness are passed down on the X…

Q: 1. Can you think of anything that would prevent meiosis from occurring in an organism with one set…

A: Introduction  Chromosomes are long, coiled structures that are composed of DNA and proteins and are…

Q: Color blindness is an X-linked recessive trait. An XX female can be colorblind in one eye due to…

A: X chromosome inactivatiom is a random process. Either of the X chromosome is inactivated in human in…

Q: How come the conclusion came to be as half of the son and none of the daughter have precorious…

A: It is a condition in which a child's body changes in an adult too soon before pubery.

Q: Genes G and H are located on chromosome 18. A woman with the genotype Gg Hh has a child with a man…

A: Nondisjunction refers to the failure of homologous and sister chromatids to divide.

Q: 4. What are some of the limitations of karyotyping? 5. Define trisomy. Define monosomy. 6. Define…

A: Genetics involves inheritance, characteristics, DNA, genes, proteins, and chromosomes. Everyone…

Q: . A woman with Turner syndrome is found to be colorblind (an X-linked recessive phenotype). Both her…

A: Turner syndrome is a chromosomal disorder that impairs women's development. Half of the sex…

Q: Sex determination in birds is different from that in humans. The sex chromosomes in birds are called…

A: Sex ratio is defined as the ratio of males and females in the population. Generally in sexually…

Q: Use the following information as the basis for answering all questions: A diploid eukaryotic…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: Lólor blindness in humans is due to an X-linked recessive allele. Turner syndrome is a condition in…

A: Turner Syndrome is caused by abnormal absence of X chromosome in the child thus bringing a karyotype…

Q: You are an allele on a single uncondensed chromosome in a Yellow fever-carrying mosquito (Aedes…

A: The somatic cells follow the mitotic process for division and the reproductive cells or gametes are…

Q: Which of the following is true? O Meiosis and Mitosis both involve crossing over Meiosis and Mitosis…

A: Meiosis and mitosis are the two types of cell division wherein a cell divides to produce daughter…

Q: Discuss the following concepts: (a) homologous chromosomes x ½ = 2) (b) diploidy (c) haploidy

A: Chromosomes are defined as the bundles or groups of tightly and highly coiled DNA located within…

Q: ake two coins and assume that heads represent the dominant allele (A) and tails represents the…

A: In this experiment, we are simulating genetic inheritance using two coins. We assume that heads…

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: Corn has a chromosome number of 2=20. Supposing there are different aneuploidy/polyploidy in corn,…

A: The sex chromosomes decide an individual's sex. The majority of people have two sex chromosomes, one…

Q: 1. If one parent is Tt, what alleles can they pass on to an offspring? (we're talking about a parent…

A: The cross between the two types of plants in the same species is called the monohybrid cross. The…

Q: If you fertilize an adult female which is mosaic gonads (y w sn3 and mhw e gametes) with an adult…

A: Genes are divided into alleles, which are various variations of the same gene. Every gene in somatic…

Q: 5) Crossing over or recombination occurs in _____________which allows for diversity, so that…

A: a. Mitosis is a process of asexual reproduction in which the cells divide into two forming an equal…

Q: 4. Jane's father suffers from hemophilia B and her maternal grandfather was colorblind. Her first…

A: Sex -linked recessive inheritance : Most affected individuals are male. Affected males result from…

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.