Concept explainers
Explain why human offifuing resemble their parents but are not identical to them.
To explain: Why human offspring are similar to their parents but they are not identical to them.
Introduction: Heredity is the process of the transmission of traits or heritable information to the next generation in the form of DNA. Humans reproduce sexually. During sexual reproduction, the genetic information from both the parents gives a unique gene combination in the offspring. The offspring resemble their parents but are somewhat different in their genetic makeup, which explains the genetic variation.
Explanation of Solution
Humans undergo sexual reproduction and inherit one chromosome of each homologous pair of chromosomes from each parent. Each somatic cell in humans consists of 46 chromosomes, which are two sets of 23 chromosomes each (maternal and paternal set).
During sexual reproduction, most of the variation arises during fertilization and meiosis. During meiosis, the homologous chromosomes randomly align with their homologs at metaphase I. According to the law of independent assortment of chromosomes, each daughter cell shows either maternal or paternal chromosome combinations. Thus, there is a 50% chance that the offspring gets maternal or paternal chromosomes or a combination of both. Secondly, crossing over forms the recombinant chromosomes that consist of a unique combination of genes in the offspring. The next aspect is random fertilization, which could be between any male gamete and female gamete. These factors relate to the fact that the offspring resemble their parents but are not exactly identical.
Want to see more full solutions like this?
Chapter 13 Solutions
Campbell Biology
Additional Science Textbook Solutions
College Physics: A Strategic Approach (3rd Edition)
Physical Science
Introductory Chemistry (6th Edition)
Chemistry: Atoms First
Genetics: From Genes to Genomes
- Can conjoined (Siamese) twins be dizygotic twins in light of the theory that conjoined twins result from incomplete division of the embryo?arrow_forwardplease describe and explain 3 human epistatic trait.arrow_forwardBased on the text on cockroaches. 1. Compare the genetic relationship to the parent pest and its offsring. Use the word: genetically different, genetic recombinationarrow_forward
- . Consider the genotypes of two lines of chickens: thepure-line mottled Honduran is i/i ; D/D ; M/M ; W/W, andthe pure-line leghorn is I/I ; d/d ; m/m ; w/w, whereI = white feathers, i = colored feathersD = duplex comb, d = simplex combM = bearded, m = beardlessW = white skin, w = yellow skinThese four genes assort independently. Starting withthese two pure lines, what is the fastest and mostconvenient way of generating a pure line that has coloredfeathers, has a simplex comb, is beardless, and has yellowskin? Make sure that you showa. the breeding pedigree.b. the genotype of each animal represented.c. how many eggs to hatch in each cross, and why thisnumber.d. why your scheme is the fastest and the mostconvenientarrow_forwardexplain epistasis in retrievers. use a punnet square.arrow_forwardExplain how heterochrony could lead to the development of a long neck in giraffes, compared to its relatives.arrow_forward
- a) a combination of regular and lack of anterior segments in the offspring. b) unable to determine because genotype and phenotype of the mother does not correspond. c) regular structure onlyarrow_forwardWhy is it more difficult to determine the sex of a newlyhatched canary than a newborn puppy?arrow_forwardans these complete fast pleassarrow_forward
- Biology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxPrinciples Of Radiographic Imaging: An Art And A ...Health & NutritionISBN:9781337711067Author:Richard R. Carlton, Arlene M. Adler, Vesna BalacPublisher:Cengage LearningBiology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage Learning
- Human Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning