PPT-Hair Color: Traits and Genes

KT Leitl Basic Facts of Human Hair Genes in hair color arent fully established Theory At least two gene pairs control human hair color Two pigments for hair color Eumelanin and Pheomelanin. Learned Behavior. A behavior that has changed because of a certain experience.. What are some behaviors we learn?. Let’s list some. not to fight with sibling (irritates adults), watch less TV so I can get school work finished,turn in work because of loss of recess,go to bed early so not tired in morning. Humans have approximately . 20,000 – 30,000. genes that code for traits. . However, only have . 46 chromosomes. . Thus each chromosome must have . many genes. on them. . Often seen in . Sex-Linked Traits. Learned Behavior. A behavior that has changed because of a certain experience.. What are some behaviors we learn?. Let’s list some. not to fight with sibling (irritates adults), watch less TV so I can get school work finished,turn in work because of loss of recess,go to bed early so not tired in morning. Chapter 13. Alleles and Traits. Blending . inheritance. Example: Black and white horse will produce . _________offspring. Failed to explain how traits disappear over several generations and then . _________________unaltered . We can PREDICT Traits!. Review: Observe the Family Below and list some observable TRAITS. What traits seem to have been passed down?. Traits Review. Some traits are inherited. Similar to the traits your parents have. Kyle . Stutts. . Sam . houston. state . university. Sex-Linked Characteristics. Objectives. Students will be able to:. Comprehend how inheritance plays a role in sex-linked genes. Explain the difference between sex- linked, limited, and influenced inheritance. Characteristics = Traits. A characteristic of an organism may be . inherited. or . acquired. .. You are a unique individual.. Characteristics about you are called . traits.. Examples: Eye color, basketball skills. . Height. . Tall. Medium Short . . Weight. . . Thin. . Average. . Chubby. . . Body. . Build. . Athletic . or. . Muscular . or. . . . Complete a Punnett Square for these crosses:. In seals, the gene for the length of the whiskers has two alleles. The dominant allele (L) codes long whiskers and the recessive allele (l) codes for short whiskers. A heterozygous and a homozygous recessive seal are crossed.. Many human traits are controlled by a single gene with two alleles as was seen with Mendel’s experiments.. Ex: widow’s peak, dimples, cleft chins, curly hair.. Other traits such as blood type and height may be controlled by many different genes or alleles.. TRAITS. . Passed from parent to offspring. Why do not all offspring with the same parent look the same?. THE GENES on THE CHROMOSOMES. TRAITS : What are they good for?. Chromosomes are structures in the . In a plant, long stems are dominant (L) to short stems (l). If a homozygous dominant flower and a homozygous recessive plant are crossed, what would be the phenotypic ratio of their offspring?. Science Fact of the Day. 1. CH 13: Inheritance. Genetics. is the study of . heredity. - or how traits are passed from parent to offspring [INHERITANCE]. Individuals share traits because chromosomes carry the . same genes. Exceptions to . mendelian. Genetics. Nonmendelian. Genetics. Inheritance is often . more complex . than it is for traits like those Mendel studied. Several factors can complicate it. .. While a dominant and recessive version of a trait is most common, it is not the only way genes can be .