only at the pseudoautosomal regions. Genes in the pseudoautosomal regions on the Barr body X chromosome escape inactivation. Nonhomologous regions of the X and Y chromosome condense to form a sex vesicle during leptotene. Although one of the two X chromosomes in XXY males becomes a Barr body, XXY males have three doses of the genes in the PAR regions.

Q: Match the letter of the term with its description. Centriole Chromosome Chromatid Diploid DNA Gene…

A: DNA is a genetic material which carries information from one generation to another in form of genes.…

Q: Centrioles at opposite end of cell Spindle fibres attached to centromeres 46 double stranded…

A: Human cells diploid 2n have 46 chromosomes then they organized into 23 pairs. 22 autosomal and 1…

Q: The accompanying illustration shows one possible outcome of the random alignment of homologous…

A: Meiosis is a type of cell division in which a diploid mother cell divides into four genetically…

Q: A female is heterozygous for an X-linked gene.  If nondisjunction happens for the sex chromosomes…

A: Introduction :  Aneuploidy is the term used to describe a cell that has an abnormally high/low…

Q: For a mutation to be passed onto offspring, it must be: found on the X chromosome present in a…

A: Mutation is defined as the changes in the sequence of base pairs in the DNA because of various…

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: Select true or false in for each of the following statements about synapsis and crossover. Sister…

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

Q: Female flies with white eyes and miniature wings (both X-linkedrecessive traits) were crossed to…

A: Chromosomal composition of these rare females will be – XXY. Both the X chromosomes must be coming…

Q: Which of the following is false regarding Down Syndrome? O can be caused by a Robertsonian…

A: The thread like structures seen inside the nucleus of every cells are called chromosomes. These are…

Q: Which of the statements is FALSE?

A: We must have prior knowledge of the following areas in order to comprehend each statement in the…

Q: Which of the following best explains why chromosomes 13, 18 and 21 are the only autosomes that are…

A: Trisomy is a genetic disorder in which a person has three copies of a particular chromosome instead…

Q: A diploid cell in a Canadian beaver will have 20 pairs of homologous chromosomes. Which of the…

A: A haploid gamete contains half the number of chromosomes as a diploid cell. In this case, a diploid…

Q: Which of the following facilitate chromosome separation during anaphase of mitosis? All of these…

A: Amaphase is the third stage of mitosis. In this stage the chromosome starts separating and moving…

Q: In mice, the Sry gene is located on the Y chromosome very close to one of the pseudoautosomal…

A: The chromosomes are the genetic material present in the nucleus of the cell which is a condensed…

Q: Draw and label the mitotic phases (prophase, metaphase, anaphase & telophase) and meiotic phases…

A: The process in which a cell divides itself to form daughter cells is known as cell division. Cell…

Q: What would be a likely consequence if cohesin removal during meiosis occurred in the same way as…

A: Although the process of meiosis is similar to mitosis, haploid gametes are generated instead of…

Q: A human is discovered to have a sex chromosome karyotype of XXY. What phenotypic sex would this…

A: Each cell in the human consists of 23 pair of chromosomes that forms 46 chromosomes. An offspring…

Q: Crossing over occurs. As a result, there is exchange of genetic materials betwoon chromosomes. Name:…

A: Mitosis and meiosis are the cell division in which chromosome divides for growth and reproduction.

Q: Centrioles at opposite end of cell Spindle fibres attached to centromeres 46 double stranded…

A: Metaphase - is the stage of cell cycle where condensation of chromosomes occurs. This is the stage…

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: DA At Meiosis I sister chromatid cohesion is lost along the length of the entire chromosome to allow…

A: During the synthesis phase (S phase) of the cell cycle, chromosomes are duplicated while in the…

Q: what is the significance of chromosomal aberration? what are the different types of chromosomal…

A: Chromosome contains the genetic information of the organism.

Q: In the plant, Haplopappus gracile there is one long pair and one short pair of chromosomes. In the…

A: As given in the question, Haplopappus gracilis is a diploid have one short and one long pair of…

Q: All of the following are distinctions between the process of mitosis and meiosis EXCEPT: Group of…

A: Cells divide and reproduce in two ways, mitosis and meiosis.  Mitosis is a process where a single…

Q: Consider a cell with 2 pairs of homologous chromosomes where Chromosome 1 with genes VWXYZ is the…

A: The impact of Chromosome 1 (YZ genes) and Chromosome 3 (ST genes) reciprocal translocation on the…

Q: One reason that worker bees forgo their own reproduction to help their sister (the queen) reproduce…

A: In Haplodiploid behaviour female  are diploid and male are haploid.   Females  are diploid. They…

Q: A sexually reproducing organism has the following phenotype DdEeAaTt. The D and E loci are on the…

A: Introduction - The centromere of metacentric chromosomes is placed halfway between the ends of the…

Q: Older mothers are at greater risk of giving birth to Down syndrome children because: 1. Higher…

A: Since older eggs have a higher risk of incorrect chromosome division, a woman's chances of having a…

Q: Chromosome structure is composed of the following Telomere Centromere Chromatids All of the above

A: A chromosome is a thread-like long DNA molecule containing the genetic information of an organism.…

Q: Define the following terms: Autosomes Sex Chromosomes Gametes Gonads Meiosis Mitosis Sertoli Cells…

A: Chromosomes are the condensed form of linear DNA that contains genetic information.

Q: All of the following could be deduced from the table except CRITERIA MITOSIS MEIOSIS 1. No. of…

A: Introduction Mitosis and meiosis are the two kinds of cell division. When people say "cell…

Q: Two chromosomes have the ff. order of genes: Normal                        A  B   centromere C  D…

A: a) Paracentric inversion: it's the type of inversion that doesn't involve the exchange of genes…

Q: Describe the molecular process of X-chromosome inactivation.This description should include the…

A: Introduction: Female offspring has two X chromosomes, one of which is inherited from mother and the…

Q: How many chromatids are present for each type of chromosome at the completion of crossing over? What…

A: Crossing over is the process in genetics by which the two chromosomes of a homologous pair exchange…

Q: Which of the following statements regarding X-inactivation is TRUE?(posted)  Inactivated X…

A: Fertilization is an event in which the female and male gametes fuse to give rise to a diploid…

Q: Which of the following sentences is CORRECT: O Nuclear envelopes re-form in anaphase II…

A: Introduction  In our body cells are continuously dividing to replenish the old cells and to form the…

Q: During meiosis in male mammals, sex chromosomes segregate to produce two types of sperm: X‑bearing…

A: In mammals sex determination is male heterogametic type in which the male produces two types of…

Q: Briefly describe the molecular processes that cause one X chromosome in each female cell to be…

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

Q: What is a sex pilus and which cell type, F- or F+,would produce this structure?

A: The transfer of the genetic material from one bacterium to another through direct contact is termed…