
Concept explainers
To determine: The most common type of birth defect in the single-birth group.
Introduction: During the gestation period, the mother can have single birth or multiple births. Single birth is where the mother carries only one fetus during the gestation period in the womb. Multiple births are where more than one fetus is carried during the gestation period, such as twins, triplets, quadruplets, and more. Carrying more than one fetus in the womb results in insufficient supply of nutrient to the developing fetus. These fetuses become still-born or born with abnormalities.

Explanation of Solution
Scientist YT studied the correlation between birth defects and multiple births in City F from 1996 to 2000. The scientist calculated the relative risk of birth defect with factors including type of birth, maternal age, economy, race, and medical care provided during pregnancy. The relative risks were calculated using a scale of 1. Relative risk lesser than 1 indicate that multiple births possess less risk of the occurrence of respective birth defects. Relative risk greater than 1 indicates that multiple births do possess a greater risk of the same. The generated data are given in Fig. 42.16.
According to the study, heart defects were the most common type of birth defect in the single-birth group, which may be due to genetic disorders.
The most common type of birth defect in the single-birth group is heart defects.
Want to see more full solutions like this?
Chapter 42 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
- Describe the levels of structural hierarchy for the human body, starting with the organismal level and ending with the chemical level. In addition, you should make sure you link each level to the previous level, emphasizing the structural relationships.arrow_forward9 S es Read the section "Investigating Life: In (Extremely) Cold Blood." Then, drag and drop the terms on the left to complete the concept map. Red blood cells Genes Icefishes -have mutated have colorless Oxygen have few lack encode Blood Cellular respiration consists of- contain carries is a Platelets White blood cells carries low amounts of Hemoglobin is necessary for Plasma Protein Reset.arrow_forwardPlating 50 microliters of a sample diluted by a factor of 10-6 produced 91 colonies. What was the originalcell density (CFU/ml) in the sample?arrow_forward
- Every tutor here has got this wrong, don't copy off them.arrow_forwardSuppose that the population from question #1 (data is in table below) is experiencing inbreeding depression (F=.25) (and no longer experiencing natural selection). Calculate the new expected genotype frequencies (f) in this population after one round of inbreeding. Please round to 3 decimal places. Genotype Adh Adh Number of Flies 595 Adh Adh 310 Adhs Adhs 95 Total 1000 fladh Adh- flAdn Adh fAdhs Adharrow_forwardWhich of the following best describes why it is difficult to develop antiviral drugs? Explain why. A. antiviral drugs are very difficult to develop andhave no side effects B. viruses are difficult to target because they usethe host cell’s enzymes and ribosomes tometabolize and replicate C. viruses are too small to be targeted by drugs D. viral infections usually clear up on their ownwith no problemsarrow_forward
- This question has 3 parts (A, B, & C), and is under the subject of Nutrition. Thank you!arrow_forwardThey got this question wrong the 2 previous times I uploaded it here, please make sure it's correvct this time.arrow_forwardThis question has multiple parts (A, B & C), and under the subject of Nutrition. Thank you!arrow_forward
- Calculate the CFU/ml of a urine sample if 138 E. coli colonies were counted on a Nutrient Agar Plate when0.5 mls were plated on the NA plate from a 10-9 dilution tube. You must highlight and express your answerin scientific notatioarrow_forwardDon't copy off the other answer if there is anyarrow_forwardAnswerarrow_forward
- Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage LearningBiology: The Unity and Diversity of Life (MindTap...BiologyISBN:9781305073951Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa StarrPublisher:Cengage LearningNutrition Through The Life CycleHealth & NutritionISBN:9781337919333Author:Brown, Judith E.Publisher:Cengage Learning,
- Case Studies In Health Information ManagementBiologyISBN:9781337676908Author:SCHNERINGPublisher:CengageBiology: The Unity and Diversity of Life (MindTap...BiologyISBN:9781337408332Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa StarrPublisher:Cengage Learning



