Essentials of Genetics - Masteringgenetic
9th Edition
ISBN: 9780134143699
Author: KLUG
Publisher: PEARSON
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Chapter 5, Problem 12PDQ
When cows have twin calves of unlike sex (fraternal twins), the female twin is usually sterile and has masculinized reproductive organs. This calf is referred to as a freemartin. In cows, twins may share a common placenta and thus fetal circulation. Predict why a freemartin develops.
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When cows have twin calves of unlike sex (fraternal twins), the female twin is usually sterile and has masculinized reproductive organs. This calf is referred to as a freemartin. In cows, twins may share a common placenta and thus fetal circulation. Predict why a freemartin develops.
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Chapter 5 Solutions
Essentials of Genetics - Masteringgenetic
Ch. 5 -
CASE STUDY | Doggone it!
A dog breeder...Ch. 5 - CASE STUDY| Doggone it! A dog breeder discovers...Ch. 5 - CASE STUDY| Doggone it! A dog breeder discovers...Ch. 5 -
CASE STUDY | Doggone it!
A dog breeder...Ch. 5 - HOW DO WE KNOW? In this chapter, we have focused...Ch. 5 - Review the Chapter Concepts list on p. 84. These...Ch. 5 - As related to sex determination, what is meant by...Ch. 5 -
4. Contrast the life cycle of a plant such as...Ch. 5 - Prob. 5PDQCh. 5 -
6. Describe the major difference between sex...
Ch. 5 - How do mammals, including humans, solve the...Ch. 5 -
8. What specific observations (evidence) support...Ch. 5 - Describe how nondisjunction in human female...Ch. 5 -
10. An insect species is discovered in which the...Ch. 5 -
11. Given your answers to Problem 10, is it...Ch. 5 - When cows have twin calves of unlike sex...Ch. 5 -
13. An attached-X female fly, XXY (see the...Ch. 5 -
14. Assume that on rare occasions the attached X...Ch. 5 - It is believed that any male-determining genes...Ch. 5 -
16. What is a Barr body, and where is it found...Ch. 5 - Indicate the expected number of Barr bodies in...Ch. 5 - Define the Lyon hypothesis.Ch. 5 - Can the Lyon hypothesis be tested in a human...Ch. 5 - Predict the potential effect of the Lyon...Ch. 5 -
21. Cat breeders are aware that kittens...Ch. 5 -
22. What does the apparent need for dosage...Ch. 5 - In mice, the Sry gene (see Section 5.2) is located...Ch. 5 - The genes encoding the red- and...Ch. 5 - In mice, the X-linked dominant mutation Testicular...Ch. 5 -
26. Shown here are graphs that plot the...Ch. 5 -
27. In chickens, a key gene involved in sex...
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- In the fertility awareness method of birth control, a woman gauges her monthly fertile period by monitoring changes in the consistency of her vaginal mucus. What kind of information does such a method provide about the likelihood of getting pregnant?arrow_forwardIn which group is parthenogenesis a normal event? a. chickens b. bees c. rabbits d. sea starsarrow_forward_____ production is continuous from puberty onward in males; _____ production is cyclic and intermittent in females. a. Egg; sperm b. Sperm; egg c. Testosterone; sperm d. Estrogen; eggarrow_forward
- The cluster of developing cells from conception birth is called anarrow_forwardEarly pregnancy tests used antibodies to detect the presence of human chorionic gonadotropin (hCG) in maternal urine. Explain how hCG, produced by the chorion, gets in maternal urine.arrow_forwardAt what stage uteroplacental circulation started? a.Maternal blood entering the lacunar b.Formation of lacunar c.Formation of extraembryonic mesoderm d.Embryo completely embeddedarrow_forward
- ________________________is the period of development from fertilization to birth, whereas is the period of development from birth to death.arrow_forwardtrue or false: Identical twins are a result of totipotent cells splitting apart after one egg is fertilized by one sperm.arrow_forwardHow does amount of yolk affect cleavage? Compare cleavage in a sea star with that in a birdarrow_forward
- Explain the way in which the yolk amount affects the cleavage. Compare the Cleavage in a sea star and bird.arrow_forwardPlacenta is the structure formed : by fusion of germ layers by foetus only by the union of foetal and uterine tissue by uterine onlyarrow_forwardWhen a woman breastfeeds, milk letdown can occur in the breast thatis not being suckled. Explain how this response happens.arrow_forward
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