Why is the frequency of recombinant gametes always half the frequency of crossing over?

Q: For a hexaploid what is the value of x where x refers to the basic chromosomenumber that makes up a…

A: Ploidy refers to the number of chromosomes present in the nucleus of a cell. In normal somatic…

Q: What is parental or noncrossover gametes?

A: Actual traverse during meiosis I is a typical occasion. The impact of this occasion is to improve…

Q: What effect does crossing over have on linkage?

A: Linkage is a tendency of the genes present on a chromosome to remain linked together and also passed…

Q: All of the following would be visible on a karyotype except O aneuploidy. polysomy. trisomy.…

A: A karyotype is a person's assortment of chromosomes. The term additionally alludes to a research…

Q: . If the G locus were 50 or more map units from the centromere, what types and proportions of…

A: Tetraploid means the the species has 4 copies of the genes present ie two diploid gametes would meet…

Q: Why are the nonrecombinant offspring more common than the recombinant offspring?

A: Reproduction is a natural process in which offspring’s are produced from the parents. Reproduction…

Q: Inversion heterozygotes can have a higher probability of producing gametes that are abnormal in…

A: Organism consisting of an one homolog consisting of inverted Segment while another consists of…

Q: Given the end results of the two types of division, why is it necessary for homologs to pair during…

A: Cell cycle is a series of changes that occurs in a newly divided cell through which it duplicates…

Q: Why are specific alleles of two distant genes more likely to show recombination than those of two…

A: Recombination is a phenomenon that is seen during meiosis crossing over. Recombination is the main…

Q: In a sample of 1000 patients with Down syndrome, a geneticist discovers that 95% of them are…

A: Trisomy is a kind of polysomy in which three instances of a particular chromosome occurs. Generally…

Q: What will be the phenotypic ratio for a heterozygous cross between Pp and Pp?

A: An allele is a variant form of a given gene.  Phenotype is the observed physical traits of an…

Q: Are all reciprocal translocations likely to result in sterility? How can one result in normal…

A: Reciprocal translocation is one of the two types of chromosome translocation. Chromosome…

Q: Why do you think there are no viable trisomies of chromosome 1?

A: Chromosome 1 is the largest chromosome in human. Approximately 8% of the total DNA is found in this…

Q: What are the products of crossing over?

A: The process in which parent cells divide and produce two or more daughter cells is referred to as…

Q: Why is the upper limit of recombination 50% rather than 100%?

A: The genes are the primary unit of life. The nucleotide sequence of the genes are responsible for…

Q: Which of the karyotypes shown is from a normal female?

A: A karyotype represents all the 23 pairs of chromosomes in a picturized form. It provides information…

Q: How many different types of gametes can be formed by individualsof the following genotypes? What are…

A: BASIC INFORMATION  COMMON TERMS USED IN GENETICS  HETEROZYGOUS - Every gene has two characters one…

Q: Why does more crossing over occur between two distantly linkedgenes than between two genes that are…

A: Answer- Crossing over is the mechanism in which a part of the sister chromatids of the homologous…

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 inversion heterozygotes ?

A: Heterozygote can be defined as the genes that are  for the specific trait are considered to be…

Q: A fruit fly of genotype B R/b r is testcrossed with b r/b r.In 84 percent of the meioses, there are…

A: Recombination means the method of generating a new blend of genes by crossing over by meiosis…

Q: In a species with 2N of 10, how many chromosomes are in a autotriploid?

A: *Polyploidy: Having multiple sets of chromosomes Ex. Triploid 3n , tetraploid 4n *Autotriploidy ( 3n…

Q: What is the end result of crossing over?

A: Crossing over allows the exchange of genetic material and forms unique combinations of alleles. This…

Q: What is the effect of linkage and recombination on gamete genotypes?

A: Nucleus is a main controller of the cell which comprises of thread like structure known as…

Q: What types of gametes are formed by the following genotypes? All gene pairs are segregating…

A: Introduction : The number of gametes formed is determined by the number of heterozygous alleles…

Q: Does mitotic recombination occur in a gamete (sperm or egg cell) or in a somatic cell?

A: Cell division is typically a part of a broader cycle of cells. There are two distinct forms of cell…

Q: How many chromosomes are involved in duplication?

A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…

Q: What kind of chromosomal mutations is/are produced by unequal crossing over?

A: Mutation refers to both the process of altering a gene or chromosome and the outcome of that…

Q: How did the cessation of crossing-over contribute to the disparity between the X and Y chromosomes?

A: Crossing over is a process where two homologous chromosomes exchange their genetic material to…

Q: How many different types of gamete can be formed from an organism with the genotype AaBbccDDEeff,…

A: Mendel performed a series of experiments to study the transmission of traits from parents to their…

Q: Under what circumstance might two loci be on the same chromosome but behave as if independently…

A: Gene- It is a segment of DNA that is responsible for hereditary characters. It is present always in…

Q: Which non-disjunction event has more chromosome number aberrations? Why?

A: Meiosis is a reductional division. It produces haploud gametes.

Q: What is inversion heterozygote?

A: Inversion is a chromosomal rearrangement when a segment of chromosome breaks and then rejoins in…

Q: What is heterozygous variant?

A: The term heterozygous variant belongs to a subdivision of biology, genetics. Genetics is the study…

Q: What is crossover? When does it happen? What are the consequences?

A: The cell cycle is the sequence of events that take place in the cell. The cell cycle has 4 main…

Q: What is the difference between recombination and crossing over?

A: The study of genetic variations, heredity, and genes is called genetics.

Q: why Monoploids as well as polyploids containing odd numbersof chromosome sets are usually sterile?

A: The changes in the chromosome are of two kinds that involve changes in the complete set of the…

Q: What are noninformative matings. ?

A: The mating that reveals the inheritance or linkage relationships of a gene or an allele are…

Q: An individual is heterozygous for a reciprocal translocation, with the following chromosomes: A • B…

A: Translocation is caused due to separation of a chromosome segment and its union to a non-homologous…

Q: What is the difference between polygeny and pleiotropy?

A: Biological inheritance, also called heredity, is the process by which different traits are passed on…

Q: Why do individuals with an excessive number of sex chromosomes often show minimum phenotypes?

A: Introduction :- The X and Y chromosomes are found in humans and most other mammals. Males have both…

Q: How do we know if Nondisjunction occurs in meiosis one or two?

A: Meiosis is a type of cell division which generally occurs in germ cells or reproductive cells.…

Q: How many different gamete genotypes are produced in a four-gene cross with incomplete genetic…

A: If the linkage is complete, there should be parental combinations only and no recombination.…

Q: based on fig 1. Is this karyotype a male or female? Is there a chromosomal disorder? What type of…

A: Karyotype --  is complete collection of chromosomes of a person it may be a male or female karyotype…

Q: What is a crossing over, and what is the purpose of it?

A: The cell cycle is the orderly series of events allowing a cell to grow and divide forming daughter…

Q: What does the sex chromosome genotype XYY produce in humans?

A: A type of genetic condition where a male has an extra Y chromosome, is called an XYY syndrome. This…

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.