Biology Now, 2e

126 ■ CHAPTER 07 Patterns of Inheritance GENETICSGENETICS to identify the genetic basis of dog size. Lark collected skeletal mea ...

Dog Days of Science ■ 127 A disease is a condition that impairs health. It may be caused by external factors, such as infection ...

128 ■ CHAPTER 07 Patterns of Inheritance GENETICSGENETICS depending on which allele of the expression gene (E or e) is present. ...

Dog Days of Science ■ 129 After their success with dog size, Lark and Ostrander identified genes responsible for other traits—fu ...

Does Bigger Mean Better? Lungfish 130,000 Mb Red-Spotted Newt 39,100 Mb Chicken 1,200 Mb Human 3,200 Mb Dog 2,400 Mb White Spruc ...

Dog Days of Science ■ 131 Figure 7.11 Gordon Lark and Mopsa involved in an eye disease that causes blindness in both humans and ...

132 ■ CHAPTER 07 Patterns of Inheritance THE QUESTIONS The Basics (^1) Link each term with the correct definition. GENOTYPE 1. A ...

Dog Days of Science ■ 133 Tr y Something New (^10) The silver fox (see “The New Family Pet?” on page 127) belongs to the same sp ...

A Deadly Inheritance How researchers identified a mysterious genetic disorder, and their risky effort to develop a cure. ◆ (^) I ...

135 GENETICS 08 CHAPTER CHROMOSOMES AND HUMAN GENETICS ...

136 ■ CHAPTER 08 Chromosomes and Human Genetics GENETICS in Germany, holding tightly to the hope that he might be able to save F ...

A Deadly Inheritance ■ 137 members over two or more generations of a family’s medical history (Figure 8.2). Pedigrees provide sc ...

138 ■ CHAPTER 08 Chromosomes and Human Genetics GENETICS is male or female. All other chromosomes are called autosomes. Autosome ...

A Deadly Inheritance ■ 139 syndrome, in which females receive only one X chromosome, is an exception to this rule. Turner syndro ...

140 ■ CHAPTER 08 Chromosomes and Human Genetics GENETICS chromosomes. If the two alleles at a locus are different, the cell is h ...

A Deadly Inheritance ■ 141 The SRY gene does not act alone; in both males and females, other genes on the auto- somes and sex ch ...

142 ■ CHAPTER 08 Chromosomes and Human Genetics GENETICS disorders. Aldrich correctly concluded that the gene leading to the fam ...

Genetic Diseases Affecting Americans 6 ,037 births Down Syndrome U.S. births per year: 4,000,000 Male U.S. births per year: 2,05 ...

144 ■ CHAPTER 08 Chromosomes and Human Genetics GENETICS (^12) 3 4 5 6 7 8 9 10 1211 (^1413) 15 16 17 18 19 20 21 22 XY Huntingt ...

A Deadly Inheritance ■ 145 copy of that gene. In other words, because males cannot be heterozygous for any X-linked genes, the e ...