1. Read!

2. Read the “What Does a Geneticist Do?” Answer questions 1-8 in your SIN under the Warm Up WARM-UP: DO NOT MARK ON/WRITE ON SHEET

22. TRAITS Some traits are given to you through genes and some are acquired. Give me some examples

23. SEXUAL REPRODUCTION There is a greater variation in offspring when dealing with sexual reproduction. Why? Two parents with two sets of DNA.

24. GENES Unit of heredity that occupies a specific location on a chromosome and codes for a particular product. IN PAIRS!

25. HEREDITY Passing of genes from parent to offspring. Many traits are coded by more than just one gene.

26. ALLELES Various forms of the same gene are called alleles. Ex. Height- we have many variations of height COME IN PAIRS!!!

27. PHENOTYPE Describes the actual characteristics that can be observed Ex. Height, size of feet, absence or presence of fold in eyelid.

28. GENOTYPE Name for the genes an organism has Not always obvious from the phenotype Sometimes your genes contain information that is not expressed in your phenotype.

29. DOMINANT ALLELE Expressed in the phenotype even if only one copy is present in the genotype Even if the other allele is an alternative form.

30. RECESSIVE ALLELE Expressed only when two copies of it are present. If one chromosome in the pair contains a Dominant allele, and the other a Recessive, The Dominant allele will be expressed!!

31. Individually, read the “Genetics Vocabulary” worksheet and answer the questions. (If not finished, we will finish tomorrow.) CLASSWORK