Sexual reproduction involves crossing-over to mix up genes. Is this a good thing or a bad thing? In the discussion this week explain one pro and one con to crossing-over. Overall, what is your opinion of crossing-over? Can evolution occur without it? (Min. 50 words)

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: Diploid vs. Haploid: Given 2n = 30 a. Haploid (n) number?  b. This organism has a total of how many…

A: Chromosome is made up of protein and single DNA molecule and is a thread like structure which is…

Q: • What is the total number of chromosomes this organism has? • What is the haploid number (n) of…

A: During the prophase of mitosis, significant changes occur in the organization and structure of…

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A: A calico cat is a homegrown cat of any variety with a tri-variety coat. The calico cat is generally…

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A: Genes are the functional unit of heredity. It carries information that is transferred from one…

Q: Which of the following best describes the role of recombination in genetic variation? Group of…

A: Approach to solving the question: To determine the best description of the role of recombination in…

Q: heterozygous condition results in a color known as tortoise shell, with both alleles expressed. This…

A: Answers:    In cats, yellow color is due to one allele, and black color is due to another allele.…

Q: II. This type of cell division occurs during the formation of both sperm and ovum. The first meiotic…

A: Answer is option d.) one secondary oocyte and one polar body.

Q: Sex-reversed females with XY were found to be missing SRY gene on their Y chromosomes, while…

A: Sex determination in humans is a complex process impacted by the combination of sex chromosomes and…

Q: In mammals, there are two sex chromosomes, X and Y, which behave like homologous chromosomes during…

A: To give rise to an XYY male, there must be an extra Y chromosome in the offspring's genetic makeup…

Q: A cell has four pairs of chromosomes. Assuming that crossing over does not occur, what is the…

A: Meiosis is the type of nuclear division in which haploid cells are formed from the diploid cells. It…

Q: In what 3 ways does sexual reproduction result in genetic recombination?

A: Genetic variation is the difference in DNA among organisms or between communities. Mutation and…

Q: The following reciprocal crosses were carried out using snails and analyzing the direction in which…

A: Reciprocal complementary crosses are the crosses where the phenotypes of female and male are…

Q: Two yeast strains were mated. One was red with mating type A the other was red+ with mating type B.…

A: 41        red+     B     (Parental) 43        red       A     (Parental) 10        red+     A…

Q: What is interrupted mating experiment?

A: The interrupted mating technique is used to show the linear transfer of genetic material during the…

Q: List three reasons why individuals that result from sexual reproduction do not have the same DNA…

A: In sexual reproduction, the offspring is usually genetically different and diverse compared to its…

Q: Homologous chromosomes a) are formed when the chromosomes separated during anaphase b) are matching…

A: The nucleus of cell contains chromosomes. Chromosome are the structures that resemble threads. They…

Q: Genes in chromosomes in mother's cells Genes in chromosomes in father's cells Genes in chromosomes…

A: Nucleus is chief controller of the cell which carriers genetic instructions. It consists of…

Q: Shown below is a karyotype from a human being. How many total autosomes does this individual have?…

A: A chromosome is a long DNA molecule that contains part or all of an organism's genetic material.…

Q: An individual comes into your genetics clinic to be tested for any anomalies. When looking at their…

A: Given: An individual come to your genetics clinic to be tested for any anomalies.When looking at…

Q: If humans have 46 chromosomes in each of their body cells, determine how many . Sperm • Egg . .…

A: Introduction: Chromosomes are thread-like structures found in animal and plant nuclei. Protein and a…

Q: hich of the following is least likely to produce genetic variation in the offspring of an…

A: Answer: GENETIC VARIATION : It is the variety or changes in the genetic makeup of an individual from…

Q: Please observe the tetrad of duplicated homologous chromosomes. Have a single crossover take place…

A: Alleles are the alternative form of a gene that are located on the same locus of Homologous…

Q: In January 2009, Natalie Suleman successfully gave birth to octuplets and became known as Octomom.…

A: FSH

Q: How many cells are required to produce 1000 cells in a complete mitotic and meiotic division? 250…

A: Mitotic division It is a process where a single cell divides into two identical daughter cells.…

Q: In regards to MEIOSIS, give the order of the following events in terms of chromosome number.…

A: Meiosis is reductional division. Mitosis is equational division.

Q: In which behaviour of chromosomes do mitosis and meiosis differ from each other? In meiosis,…

A: Mitosis and meiosis is divisions and occur in somatic and germ cell and consist of interphase,…

Q: Donkey Zebra Donkey Body Cell: 62 chromosomes Zebra Body Cell: 46 chromosomes Donkey Gamete:…

A: Most of the mammals are diploid in nature, i.e., they have two sets of every chromosome in each…

Sexual Motivation

Sexual motivation refers to a person's overall desire for sexual activity. It is an unusual motivation. Generally, among lower animals, the term 'drive' is commonly referred to as sexual motivation. It means a certain internal force drags the animal to be involved in reproductive behavior. On the contrary, humans are not simply driven by any internal force; rather, the sexual motivation in humans is due to several factors such as biological (hormones, genes), environmental (familial upbringing, chemical exposure) and physiological factors (culture, desire) which further determine engagement in sexual activities.