
Concept explainers
Introduction: Genes are DNA sequences that code for specific traits. The specific position of a gene on a chromosome is known as locus. Genes have alternate forms known as alleles that are transmitted to offspring. If the two alleles are different, then there is a hybrid at F1 generation. The dominant allele out of the two alleles expresses itself and determines the

Answer to Problem 1SQ
Correct answer: Alternate versions of a gene for a given trait are called alleles. Therefore, option a. is correct.
Explanation of Solution
Reason for the correct statement:
Genes exist in two alternate versions called as alleles. Alleles occupy the same position known as locus on chromosomes. Each diploid organism consists of two sets of chromosomes known as homologous chromosomes. These homologous chromosomes each consist of one allele of a gene. If the two alleles at the gene locus are the same, it is known as homozygous and if two alleles are different, it is known as heterozygous.
Hence, option a. is correct.
Reasons for the incorrect statement:
Option b. is given as “heterozygotes”. Heterozygotes refer to those that have two different alleles of a gene. Hence, it is a wrong answer.
Option c. is given as “genotypes”. Genotype is the whole genetic makeup of an organism. Hence, it is a wrong answer.
Option d. is given as “copies of a gene”. The copies of a gene are formed by its duplication. Hence, it is a wrong answer.
Hence, options b., c., and d. are incorrect.
Want to see more full solutions like this?
Chapter 9 Solutions
Discover Biology (Sixth Core Edition)
- Why are nutrient absorption and dosage levels important when taking multivitamins and vitamin and mineral supplements?arrow_forwardI'm struggling with this topic and would really appreciate your help. I need to hand-draw a diagram and explain the process of sexual differentiation in humans, including structures, hormones, enzymes, and other details. Could you also make sure to include these terms in the explanation? . Gonads . Wolffian ducts • Müllerian ducts . ⚫ Testes . Testosterone • Anti-Müllerian Hormone (AMH) . Epididymis • Vas deferens ⚫ Seminal vesicles ⚫ 5-alpha reductase ⚫ DHT - Penis . Scrotum . Ovaries • Uterus ⚫ Fallopian tubes - Vagina - Clitoris . Labia Thank you so much for your help!arrow_forwardRequisition Exercise A phlebotomist goes to a patient’s room with the following requisition. Hometown Hospital USA 125 Goodcare Avenue Small Town, USAarrow_forward
- I’m struggling with this topic and would really appreciate your help. I need to hand-draw a diagram and explain the process of sexual differentiation in humans, including structures, hormones, enzymes, and other details. Could you also make sure to include these terms in the explanation? • Gonads • Wolffian ducts • Müllerian ducts • Testes • Testosterone • Anti-Müllerian Hormone (AMH) • Epididymis • Vas deferens • Seminal vesicles • 5-alpha reductase • DHT • Penis • Scrotum • Ovaries • Uterus • Fallopian tubes • Vagina • Clitoris • Labia Thank you so much for your help!arrow_forwardI’m struggling with this topic and would really appreciate your help. I need to hand-draw a diagram and explain the process of sexual differentiation in humans, including structures, hormones, enzymes, and other details. Could you also make sure to include these terms in the explanation? • Gonads • Wolffian ducts • Müllerian ducts • Testes • Testosterone • Anti-Müllerian Hormone (AMH) • Epididymis • Vas deferens • Seminal vesicles • 5-alpha reductase • DHT • Penis • Scrotum • Ovaries • Uterus • Fallopian tubes • Vagina • Clitoris • Labia Thank you so much for your help!arrow_forwardOlder adults have unique challenges in terms of their nutrient needs and physiological changes. Some changes may make it difficult to consume a healthful diet, so it is important to identify strategies to help overcome these obstacles. From the list below, choose all the correct statements about changes in older adults. Select all that apply. Poor vision can make it difficult for older adults to get to a supermarket, and to prepare meals. With age, taste and visual perception decline. As people age, salivary production increases. In older adults with dysphagia, foods like creamy soups, applesauce, and yogurt are usually well tolerated. Lean body mass increases in older adults.arrow_forward
- When physical activity increases, energy requirements increase also. Depending on the type, intensity, and duration of physical activity, the body’s requirements for certain macronutrients may change as well. From the list below, choose all the correct statements about the effects of increased physical activity or athletic training. Select all that apply. An athlete who weighs 70 kg (154 lb) should consume 420 to 700 g of carbohydrate per day. How much additional energy an athlete needs depends on the specific activity the athlete engages in and the frequency of the activity. Those participating in vigorous exercise should restrict their fat intake to less than 15%% of total energy intake. Athletes who are following energy-restricted diets are at risk for consuming insufficient protein. The recommendation to limit saturated fat intake to less than 10%% of total energy intake does not apply to athletes or those who regularly engage in vigorous physical activity.arrow_forwardWhen taking vitamins and vitamin-mineral supplements, how can one be sure they are getting what they are taking?arrow_forwardHow many milligrams of zinc did you consume on average per day over the 3 days? (See the Actual Intakes vs. Recommended Intakes Report with all days checked.) Enter the number of milligrams of zinc rounded to the first decimal place in the box below. ______ mg ?arrow_forward
- the direct output from molecular replacement is a coordinate file showing the orientation of the unknown target protein in the unit cell. true or false?arrow_forwardthe direct output from molecular replacement is a coordinate file showing the orientation of the unknown target protein in the unit cell. true or false?arrow_forwardDid your intake of vitamin C meet or come very close to the recommended amount? yes noarrow_forward
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education





