Q1: What are the odds that a given egg cell will contain an X chromosome? A Y chromosome? What are those odds for a sperm cell? Q2: If a couple has two daughters, does that mean their next two children are more likely to be sons? Explain your reasoning. (Hint: Refer back to “What Are the Odds?” on page 124.) Q3: Sisters share the same X chromosome inherited from their father, but they may inherit different X chromosomes from their mother. What is the probability that brothers share the same Y chromosome? What is the probability that brothers share the same X chromosome?

Q: The frog, Rana pipiens, has 13 pairs of chromosomes. How many chromosomes would be expected in: a…

A: Chromosome Rod shaped, Self-replicating dark strained genetic structure containing organized DNA…

Q: • How many sperm cells will be produced by 800 spermatids? (number only) • If there are 50 secondary…

A: The secondary spermatocyte divides into 2 haploid spermatids which transforms into a mature sperm by…

Q: What is the gene in the human chromosome that determines the "maleness"?

A: Gene is the sequence of nucleotides that encode a particular protein. The genes are present in the…

Q: When do females form all their ova (eggs)? At stage of Meiosis I are they halted? Can the life style…

A: The oogenesis is the process by which ova (singular- ovum) are produced in the ovary of female body.…

Q: If a male has fragile X syndrome, is his mother or father more likely to be a carrier for the…

A: The genetic disorder Fragile X syndrome (FXS) is characterised by mild-to-moderate intellectual…

Q: How many chromosomes will be produced when sperm and egg cell unite?

A: A gamete is a sex cell that has half the genetic material (haploid) of a normal body cell. Instead…

Q: Why does theheterozygote have an advantage?

A: When an individual contains a dissimilar pair of alleles for the same gene, the condition is…

Q: Why are newborns with an abnormal sex chromosome number more likely to survive than those with an…

A: Humans have a total number of 46 chromosomes that is 23 pairs of chromosomes in which 22 of them are…

Q: In which part of meiosis would you predict that chromosomal abnormalities are produced?

A: Introduction  Cytology refers to the study of cell such as cell morphology, physiology etc. As we…

Q: Why are males  more prone to having x-linked recessive disorders? a. Because the y chromosome is…

A:

Q: Concerning the sexchromosomes of the XYsystem which type of gametedo the male and the…

A: Chromosomes are thread-like structures located inside the nucleus of animal and plant cells. Each…

Q: 18. ХXY a. Which of the following terms describes the process of homologous chromosomes failing to…

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

Q: Name and describe two birth defects resulting from nondisjunction of autosomes and two from…

A: Nondisjunction of chromosomes:- Non disjunction means failure of the paired chromosomes to separate…

Q: When does meiosis occur in girls? In boys?

A: Meiosis is where a solitary cell divisions twice to deliver four cells containing a large portion of…

Q: How is it that some chromosomal abnormalities are incompatible with life as early as immediately…

A: Chromosomal abnormalities are one of the reasons of miscarriage and stillbirth and spontaneous…

Q: If you ignore the effect of crossing over, would you expect differences in the genetic information…

A: Crossing over It is defined as the exchange of genetic material that occurs in the germ line. During…

Q: Starting with One Cell describe and draw step by step the process of Meiosis I in males and females…

A: Reductional divisions is another name for meiosis I. Meiosis is used by both males and females to…

Q: How does the first meiotic division result in reducing the number of chromosomes

A: Meiosis is the type of division in which the number of chromosomes in daughter cells is half of the…

Q: Is it possible that an Xchromosome of a woman canhave come from her father?

A: Sex determination is a function of sex chromosome  in organisms. There are different ypes of sex…

Q: Which gene on the Y chromosome triggers the development of male characteristics? What would happen…

A: The Y chromosome is one of two sex chromosomes in therian vertebrates, including homo sapiens, and…

Q: Which chromosome determines the sex? Which gene determines the sex?

A: Sex determination system is a biological system which determines the development of sexual…

Q: what does a oogenesis concept map with 10 words or phrases look like?

A: oogenesis concept map :-

Q: Crossing over gives genetic and happens during the stage of meiosis I.

A: Cell division happens when a parent cell divides into two or more daughter cells.  There are two…

Q: Draw a Punnett square.  cross an XX woman with an XY man. How many kinds of eggs can a woman…

A: Chromosomes are long thread-like structures that carry coded genetic information in the form of DNA.…

Q: You are the product of all the genetic information contained in the fertilized egg cell at the…

A: Sexual reproduction- In this fusion of male and female gamete occurs. In this fusion of two gametes…

Q: Select all the features of meiosis that are true.

A: The features of meiosis includes : DNA is replicated in S phase. Nuclear envelope dissolves.…

Q: What is crossing over? Howis meiosis related to thisphenomenon?

A: Meiosis : A type of cell division in which parent cell give rise to 4 haploid (n) daughter cells.…

Q: Why do females have Barr bodies?

A: The sex chromosomes present in the males differ from the sex chromosomes present in the females. The…

Q: How is the child affected if it has grown from the zygote formed by an XX-egg fertilized by…

A: Zygote is also known as a fertilized egg because it is formed by the process of fertilization in…

Q: Do the genes of the X and Ychromosomes determine onlysex characteristics?

A: The human cell contains 23 pairs of chromosomes. The first twenty three pairs of chromosomes are the…

Q: During spermatogenesis, which of the following options describes when cytokinesis would occur?…

A: Meiosis is a process where single germ cell divides twice to produce 4 cells containing half of the…

Q: describe Full trisomy 18

A: The chromosomes are the thread like structure that contains hereditary information in the form of…

Q: What is double fertilization? Include the fate of the resulting zygote and triploid nucleu

A: In general, fertilisation is a process of fusion of male and female gametes to form a zygote.  In…

Q: The duck-billed platypus has a unique mechanism of sex determination: females have five pairs of X…

A: Chromosomes are long thread-like structures that carry coded genetic information in the form of DNA.…

Q: If you ignore the effect of crossing over, would you expect the genetic information in the two…

A: Spermatogenesis results in mature male gametes, also known as sperm but more precisely as…

Q: How many copies of each gene are found in the diploid cells in a woman’s body?

A: Introduction Any cell contains a specific number of chromosomes it is referred to as ploidy level or…

Q: whar are the meiotic events that could lead to the birth of an individual with either Patau syndrome…

A: The meiotic events causing Patau syndrome, or Turner syndrome in an individual. Introduction: Patau…

Q: What would be the sex of a human with each of the following setsof sex chromosomes?A. XXX C. XYYB. X…

A: BASIC INFORMATION Humans have 23 pairs of chromosomes out of which 44 are autosomes and 2 are sex…

Q: A woman with normal chromosomes mates with a man who also has normal chromosomes.  Q.What chromosome…

A: Nondisjunction refers to the phenomena of failure of separation of sister chromatids during cellular…

Q: Does Y chromosome play a role in sex determination ?

A: A biological system that controls the development of sexual traits in an organism is known as a…

Q: gametes (egg or sperm cells), where in the body would you expect this cell to be located?

A: Gamete production takes place for sexual reproduction.

Q: Draw a schematic diagram showing spermatogenesis vis-à-vis oogenesis. Label the stage of development…

A: Spermatogenesis : Spermatogenesis is the formation of four haploid gametes from one diploid…

Q: What is the number of chromosomes in the following cells? Primary oocyte,secondary oocyte, ootid and…

A: Oogenesis actually begins long before birth when there is an oogonium which has diploid number of…

Q: If the gene is linked to the "Y" chromosome, women will not have the disorder. Why?

A: Introduction In the nucleus of the cell DNA is packed in a thread like structure called chromosome.…

Q: A primary oocyte divides to give rise to a secondary oocyte and a first polar body. The secondary…

A: Humans reproduce by sexual reproduction by formation of gametes through meiosis. Male and female…

Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.