On rare occasions, an organism may have three copies of achromosome and therefore has three copies of the genes on thatchromosome (instead of the usual number of two copies). Forsuch a rare organism, the alleles for each gene usually segregateso that a gamete will contain one or two copies of the gene. Let’ssuppose that a rare pea plant has three copies of the chromosomethat carries the height gene. Its genotype is TTt. The plant is alsoheterozygous for the seed color gene, Yy, which is found on adifferent chromosome. With regard to both genes, how manytypes of gametes can this plant make, and in what proportions?(Assume that it is equally likely that a gamete will contain oneor two copies of the height gene.)

Q: EVOLUTION CONNECTION Crossing over is thought to beevolutionarily advantageous because it…

A: Many of the genes which are essential for the production of sperm are located on the Y chromosome.…

Q: In a fungus with four ascospores, a mutant allele lys-5 causes the ascospores bearing that allele…

A: An ascus is a sac-like structure within an ascomycete fungi that contains ascospores. Ascospores are…

Q: An inversion heterozygote has the following inverted chromosome: Centromere A B CD JI HGF E KL M…

A: Introduction :  Inversions are rearrangements in chromosome genetic sequences wherein small regions…

Q: In an epic battle, the Green Goblin was able to wound Spider-Man aind collect a samplle of his…

A: Crossing over is a phenomenon that occurs in the linked genes. When the crossing over occurs between…

Q: When Thomas Hunt Morgan crossed his red-eyed F1 generation flies to each other, the F2 generation…

A: The result observed by Thomas Hunt Morgan, where all the white-eyed flies in the F2 generation were…

Q: 4 Compare the models of the two processes. List all of the differences you can see between meiosis…

A: The M-phase (mitotic phase) of the cell cycle usually allow to satte that they are  includes mitosis…

Q: In Figure 2-11, assume (as in corn plants) that allele Aencodes an allele that produces starch in…

A: Gregor Mendel performed the experiments on Pea plants in order to understand how the traits are…

Q: Why does therecombination frequency ofgenes vary with the distancebetween them in thechromosome?

A: The genetic material exchange between the two homologous chromosomes and that produces recombinant…

Q: A gene involved with body colour in this species of fruit fly is located on the non-homologous…

A: The Gene for Eye Color in Drosophila: Red vs. BrownIntroductionThis species of fruit fly possesses a…

Q: For each of the terms in the left column, choose thebest matching phrase in the right column.a.…

A: Genetics is a branch of science that deals in the study of genes, heredity, and genetic variation of…

Q: DRAW IT Suppose, as in the questionat the bottom of Figure 15.9, the parental(P generation) flies…

A: Consider the following V= Normal wing v= Vestigial wing G= Gray body-color g= Black body-color Then,…

Q: What are mitosis and meiosis? These two processes are how parent cells produce daughter cells.…

A: Cell division is the process by which cell divides to produce daughter cells. There are two types of…

Q: This diagram shows a parental cell going through meiosis and producing 4 daughter cells. Which cel…

A: Cell division is a phenomenon takes place inside the cell in which parent cell undergo splitting…

Q: why The chromatids formedby recombination within the inversion loop of a paracentric…

A: When the region between two breaks of the same chromosome rotate 180°, it results in chromosomal…

Q: Explain why a translocation cross occurs during metaphase ofmeiosis I when a cell contains a…

A: The unusual rearrangement of the chromosomes is more specifically known as the chromosomal…

Q: While most animals cannot tolerate polyploidy, somemollusks, such as oysters, can. Although wild…

A: Some mollusks such as oysters tolerate polyploidy. Farmed oysters are triploid while the wild…

Q: A male Drosophila from a wild-type stock is discovered to haveonly seven chromosomes, whereas…

A: In male drosophila, one member of chromosome IV has translocated to the distal end of Chromosome II.…

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

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

Q: Give at least three examples of types of mutationsthat would disrupt the process of mitotic…

A: Mutation is defined as a change that causes alteration in the nucleotide sequence of DNA. This can…

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.