Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 41, Problem 3DAA
Summary Introduction
To explain: The type of defect that is more than twice risky to occur in the multiple-births than in single newborns.
Concept introduction: During the gestation period, the mother can have single birth or multiple births. The single birth is where only one fetus is carried during the gestation period in the womb. The 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 the insufficient supply of nutrient to the developing fetus. These fetuses become still-born or born with abnormalities.
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Which findings support the fact that the presence of the Y-
chromosome rather than the lack of a second X-chromosome
determines the development of maleness in mammals?
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Humans have two different sex chromosomes, X and Y.
Figure 4 below shows the inheritance of sex in humans.
Figure 4
Mother
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XX
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Y
XY XY
a)
Copy the diagram into your answer booklet and draw a circle on the part
of Figure 4 that shows an egg cell.
b)
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c)
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third child. What is the chance that this child will also be a boy?
Earlobes can be attached to the face or non-attached. An attached earlobe is a recessive trait. A female with attached earlobes (Il) has a child with a man with non-attached earlobes. He is heterozygous for this trait.
Questions:
a. What are the possible genotypes of the egg the woman can produce?
b. What are the possible genotypes of the sperm the man can produce?
c. What is the genotype ratio for the offspring?
d. What is the phenotype ratio for the offspring?
e. What is the couple's chance of having a child with attached earlobes?
Chapter 41 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 41 - Sexual reproduction ___ . a. requires formation of...Ch. 41 - The ___ is a genetic dead end. a. polar body b....Ch. 41 - Prob. 3SQCh. 41 - Prob. 4SQCh. 41 - Prob. 5SQCh. 41 - Prob. 6SQCh. 41 - Male germ cells divide by meiosis inside the...Ch. 41 - Prob. 1DAACh. 41 - Prob. 2DAACh. 41 - Prob. 3DAA
Ch. 41 - Prob. 4DAACh. 41 - A male attains an erection when ___ . a. muscles...Ch. 41 - Prob. 9SQCh. 41 - Prob. 10SQCh. 41 - Prob. 11SQCh. 41 - Match each disease with the type of organism that...Ch. 41 - Prob. 13SQCh. 41 - Match each hormone with its source. ____ FSH and...Ch. 41 - Prob. 1CTCh. 41 - Fraternal twins are nonidentical siblings that...Ch. 41 - Some sperm mitochondria enter an egg during...
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