The heterozygote has one normal chromosome... B. D. Paracentric- ... and one chromosome inversion Formation of with an inverted segment. inversion loop In prophase I of meiosis, the chromosomes form an inversion loop, which allows the homologous sequences to align. In an individual heterozygous for a paracentric inversion, the chromosomes form an inversion loop during pairing in prophase I.

Q: Which statement about homologous chromosomes is FALSE?   Select one: a. They contain the same…

A: Homologous chromosome – During fertilization in a cell, one from the pair from the mother and…

Q: An individual  heterozygous for a reciprocal translocation possesses the following chromosomes:  A B…

A: Translocation is caused by the separation of a chromosome segment and its union with a…

Q: You have a technique that allows you to measure the amount of DNA in a cell nucleus . You establish…

A: In this question they are asking about Germ cell means meiosis.

Q: Any deviation in the number of chromosomes that involves individual chromosomes, as opposed to…

A: Chromosomes are structures that are composed of DNA. Genes are located within chromosomes. During…

Q: An organism has a diploid number of 20 in a primary oocyte. a. How many tetrads are present in the…

A: Oogenesis is a kind of gametogenesis. It produces four haploid gametes (egg) from single parent…

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: I'm having some trouble with this practice problem from my study guide. If anyone can explain it it…

A: Nondisjunction occurs when homologous chromosomes (meiosis I) or sister chromatids (meiosis II) fail…

Q: A young couple is planning to have children. Knowing that there have been a substantial number of…

A: Robertsonian translocations are defines as the structural chromosomal abnormalities that is caused…

Q: In which meiotic division does the separation of the homologous occur? What are the ploidies of the…

A: Meiosis is a mode of cell division. In this one cell divides to form 4 cells.

Q: ___________ chromosome aneuploidy is usually welltolerated because only one X chromosomeremains…

A: Step 1 Aneuploidy (Heteroploidy) is a numerical change in the chromosome number in the genome or…

Q: Diploid Number of chromosomes, Sex Chromosomes, (+/- whole) Chromosome (+/- partial) e.g. 47, XY,…

A: Human cell contains 23 pairs of chromosomes.  22 autosomes and 1 pair of sex chromosomes. Human male…

Q: what is the benefit of crossing over?

A: REPRODUCTION:- It is the production of offspring from the parents. It is of two types:- 1)Asexual…

Q: 1. Gregor Mendel developed the idea of independent assortment based on his work with dihybrid…

A: 1. Mendel on working on the pea plants proposed 3 mendelian laws, the traits or genes which inherit…

Q: Here is a situation in which there is a repeated sequence. This picture shows two homologous…

A: Chromosomal crossover explains the exchange of genetic material while sexual reproduction between…

Q: Imagine an organism whose diploid chromosome number is 6, and draw a cell as it appears at the…

A: Meiosis is a reductional cell division that occurs in the sex cells or gametes. It is divided into…

Q: A person with Down syndrome has three copies of chromosome 21. Which of the following words should…

A: Triploid is used for defining the genomic content of an organism so, here the genomic content is 3n.…

Q: The physical cause of the law of independent assortment for genes on the same chromosome is which of…

A: Answer: The answer is E) Separation of homologous chromosomes in Meiosis.        It is known that,…

Q: In a particular dihybrid (T/t, B/b) the alleles of the "T and "B"genes indicated in the figure below…

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

Q: A boy with Down syndrome (trisomy 21) has 46 chromosomes. One parent and his two older sisters have…

A: Since, we are entitled to answer the first three subparts of a question. We are answering the first…

Q: How can alteration in chromosome number or structure impact living organism? Explain how Down's…

A: Meiosis also called as reductional division is the type of cell division where the number of…

Q: chromosome of genotype   C D recombines with a homolog of genotype   c d during meiosis when Spo11…

A: * Given that chromosome of genotype  "CD"  recombines with a homologous of genotype  "cd" during…

Q: Certain varieties of chrysanthemums contain 18, 36, 54, 72, and 90 chromosomes; all are multiples of…

A: The chromosome is the package of densely packed chromatin fibers with DNA and histone proteins. In…

Q: What is the notation for the following cases? ( A female having Edwards syndrome (trisomy 18)

A: The chromosomal syndrome notation includes the total number of chromosomes, then the sex chromosome,…

Q: Meiosis- a. Are the chromosomes at each pole during telophase 1 identical to chromosomes in the…

A: Meiosis is the type of cell division that reduces the number of chromosomes by half resulting in the…

Q: crossing over within a pericentric inversion produces chromosomes that have extra copies of some…

A: Chromosomes having extra copies or no copies of genes are produced by crossing over within a…

Q: Diploid Number of chromosomes, Sex Chromosomes, (+/- whole) Chromosome (+/- partial) e.g. 47, XY,…

A: Klinefelter’s syndrome and one Barr body Klinefelter’s syndrome is due to the trisomy of sex…

Q: A diploid organism produces four gametes from one parent cell through the process of meiosis.  Two…

A: Meiosis is made up of two cell divisions occurring in succession in sexually producing organisms and…

Q: Sex chromosome aneuploidy is usually welltolerated because only one X chromosomeremains __________…

A: Step 1 Aneuploidy is the numerical change in the chromosome number in the genome or genomes of an…

Q: Diploid Number of chromosomes, Sex Chromosomes, (+/- whole) Chromosome (+/- partial) e.g. 47, XY,…

A: Aneuploidy is a condition of having fewer or extra chromosomes than the normal genome number of the…

Q: Nondisjunction, is when a chromosome does not separate during meiosis. When nondisjunction occurs in…

A: Cell-division is the process by which a parent cell divides and makes two or more daughter cells. It…

Q: Look at the chromosomes in the cell nucleus below, then mark the following statements true or false.…

A: There are two types of cell divisions that occur in all organisms: Mitosis and Meiosis. Meiosis is…

Q: chromosomes are inherited from one generation to the next, they are inherited...

A: Chromosomes are inherited generation to generation in such a way that half from their mother and…

Q: With two pairs of homologous chromosomes, four kinds of gametes can be produced. How many kinds of…

A: Gametes are formed by the process of meiosis in the gamete mother cells.

Q: Rainbow trout go through a unique genetic reproductive process. Female eggs are diploid, while male…

A: Chromosomes are thread-like structures present inside the nucleus of the cell. Usually, they are…

Q: In which parent did the nondisjunction occur? Explain and/or illustrate. Did nondisjunction occur at…

A: Non-disjunction indicates that chromosomes are not properly separated, resulting in an additional or…

Q: Rainbow trout go through a unique genetic reproductive process. Female eggs are diploid, while male…

A: (Comment : As per the guidelines, we are allowed to answer one question at a time, so I am answering…

Q: The diploid chromosome number for a species is 30. What would be the total chromosome number of an…

A: Trisomy is a type of numerical chromosomal aberration. It is an example of Aneuploidy (abnormal…

Q: Parents pass chromosomes in gametes to form the zygote, which will grow and develop to become an…

A: Sperm of father will have 23 chromosomes (haploid) that fuse with ovum of mother containing 23…

Q: Arabidopsis thaliana, a small flowering plant, has a chromosome number of 2n=10. Show the changes in…

A: The DNA is highly condensed to form a chromosome. Each species have a specific number of chromosomes…

Q: in the experiment of following chromosomal dna mvement througgh meiosis, why. do you use non-sister…

A: The cell division in which the number of the chromosome reduces to half in the daughter cells is…

Q: and down syndrome the victim has an extra chromosome 21. Therefore, down syndrome is a kind of ___…

A: Genetic disorders are those which results due to any changes in gene or due to  chromosomal…

Q: If nondisjunction occurs in humans for one pair of homologous chromosomes during meiosis I. The…

A: A chromosomal mutation may occur during anaphase I of meiosis cell division, where chromosomes fail…

Q: In fruit flies, chromosomal crossing over does not occur in meiosis in males, whereas crossing over…

A: Crossing over can be defined as the exchange of genetic material between the non-sister chromatids…

Q: In Question 23, if one chromosome has R and T and the homologous chromosome also has R and T, does…

A: We are authorized to answer only one question at a time, since you have not mentioned which question…

Q: (d) With the random segregation of dyads, how many possible combinations are there at the end of…

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

Q: During meiosis both recombinant and parental type chromatids are created. Which of the outcomes…

A: The meiotic division is characterized by the formation of recombinants. This phenomenon is achieved…

Genetic Evolution

Sexual reproduction produces distinct population variations. Heredity determines the traits and qualities to be passed down to the progeny. Over time, this variation within-species is also affected by the process of human evolution. The study of how genetic variation leads to evolutionary changes is known as genetic evolution. If a trait helps an organism to survive and reproduce, it is more likely to be passed down the generations. It is rare that such traits result in a completely distinct set of traits in descendants than the ancestral population; this can result in the emergence of a new species.