read!. read the “what does a geneticist do?” answer questions 1-8 in your sin under the warm up...
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Read!
HOMEROOM
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
TRAITS
Some traits are given to you through genes and some are acquired. Give me some examples
SEXUAL REPRODUCTION
There is a greater variation in offspring when dealing with sexual reproduction. Why?
Two parents with two sets of DNA.
GENES
Unit of heredity that occupies a specific location on a chromosome
and codes for a particular product. IN PAIRS!
HEREDITY
Passing of genes from parent to offspring.
Many traits are coded by more than just one gene.
ALLELES
Various forms of the same gene are called alleles.
Ex. Height- we have many variations of heightCOME IN PAIRS!!!
PHENOTYPE
Describes the actual characteristics that can be observed
Ex. Height, size of feet, absence or presence of fold in eyelid.
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.
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.
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!!
Individually, read the “Genetics Vocabulary” worksheet and answer the
questions.(If not finished, we will finish tomorrow.)
CLASSWORK
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