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What is Genetics?
the study of heredity
What is heredity?
the biological process of passing on certain genes to offspring
What is a gene?
segment of DNA that is transferred from a parent to offspring and determines some characteristic of the offspring.
What is an allele?
one member of a pair of genes occupying a specific spot on a chromosome that controls the same trait
what are inherited traits?
genetically determined characteristics passed from parents to offspring
What is a punnett square?
a diagram used to predict the probability of offspring inheriting a particular trait
What is a genotypes?
the genetic identity of an organism
What is a phenotype?
The physical appearance of an organism
Describe a homozygous dominant genotype.
carries 2 copies of the same dominant allele (T T)
Describe a Homozygous recessive genotype.
carries 2 copies of the same recessive allele (t t)
Describe a heterozygous genotype.
carries one dominant allele and one recessive allele ( T t)
Who is the father of gentics?
Gregor Mendel
What do the leters on the outside of punnett square stand for?
The parents' genotype
what do the letters on the inside of a punnett square stand for?
The genotypes of possible offspings
What is the possibility that the offspring will be yellow?
50%
If R stands for red & and r stands for white, what is the possibility offsping will be white?
25%
