Thursday, June 7, 2018 Objective: Use a Punnett Square to predict offspring from Mendelian and non-mendelian crosses A Do Now: Word Search, 5 minutes. Write down words you DO NOT understand. What is the probability that your two hybrid parents (different alleles for each characteristic) would produce an offspring with horns? Make a Punnett square to support your answer. (Remember: how do you choose the letter to represent the alleles for a trait?) Punnett Square Practice: Sponge Bob
Period 7 Mendelian inheritance: Form of inheritance with dominant and recessive alleles. Any time a dominant allele is present, that allele will be expressed. homo- same, uniform hetero- different, non-uniform homozygous: Both alleles for the trait are the same: AA, aa; FF, ff; in Build an Animal black/black; clear/clear heterozygous: Two different alleles for the trait: Aa; Ff; black/clear homozygous = purebred heterozygous = hybrid heredity: The passing of traits from one generation to the other. allele: gene for a version of a trait genotype: exact alleles for a trait; AA, Aa, aa phenotype: trait expressed by the genotype; physical appearance.
Period 5 allele: version of a gene for a trait; represented by a single letter: A, a; N, n. In Build an Animal, the black and clear beads. Mendelian inheritance: Dominant/recessive inheritance pattern. If the dominant allele is present, the dominant trait is expressed. homo- prefix meaning "same," or "uniform" hetero- prefix meaning "different" or "nonuniform" homogeneous vanilla ice cream heterogeneous "dirt" ice cream; fudge ripple; butter pecan homozygous: both alleles for the trait are the same heterozygous: The two alleles for the trait are different genotype: exact alleles for a trait the organism has: SS, Ss, ss. In "Matter of Control," the black and clear papers, the beads in BAA. phenotype: The trait expressed by the genotype. Square, round homozygous = purebred heterozygous = hybrid
Hi! Now that I've gotten my lungs working, I need more food. I'll be moving to a pond in Somerset. Thanks for taking care of me and watching me grow!
Period 4 homo- same homozygous: both alleles for the trait are the same; LL, ll purebred: homozygous Mendelian: a form of inheritance where one trait is dominant and the other possibility is recessive. Whenever the dominant allele is present, the dominant trait is expressed. "Matter of Control" demonstrated Mendelian inheritance. heterozygous: hetero- different. The two alleles for a trait are different. Ll hybrid: heterozygous allele: a version of a trait: long/short legs, green/yellow peas. Letters stand for alleles: L, l, G, g genotype: exact alleles for a trait. AA, Aa phenotype: trait that is expressed by the alleles. Physical appearance. Aqua, green heredity: inheritance of traits genes phenotype Mom Dad
Period 2 Choose first letter of dominant trait to represent that trait. Upper case letter represents the dominant trait. Recessive gets lower case version of the first letter of the dominant trait in script Punnett square: Mom Dad write out specific alleles for each parent AND appearance next to each gene pair. After you fill in the square, write out exact alleles (genotype) inside the square with the physical appearance of the trait (phenotype) next to each gene pair. hybrid: two different traits (alleles) for the same characteristic, Tt purebred: both alleles for the trait are the same
Period 1 Choosing the letter to represent alleles: allele: specific version of a gene Characteristic: leg length Traits: Long - L The first letter of the dominant trait represents that trait. Capitalize the dominant short - l For the recessive, use the lower case script of the first letter of the dominant trait. prefixes: word chunk homo = same hetero = different -zygous - having to do with genes genotype: exact alleles for a trait phenotype: physical appearance
YY = yellow Yy = yellow yy = blue Tall T short