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Life Scienc Ch 5

Genetics

QuestionAnswer
The physical characteristics that are studied in genetics are what? traits
What are different forms of the same gene? allele
The name for the study of how alleles affect offspring is what? heredity
What is an allele inherited on a sex chromosome? sex-linked gene
We say a trait that is hidden is? recessive
The number that describes how likely it is that an event will occur is what? probability
The genetic makeup of an organism is its what? genotype
What do you call organism with two identical alleles? homozygous
What to you call the physical appearance of an organism? phenotype
What does the notation Tt mean to geneticists? one dominant allele, one recessive allele
What does a Punnett square show? all the possible outcomes of a genetic cross.
Sickle Cell anemia is an example of what kind of disorder? genetic disorder
Hemophilia results from an allele that is on which chromosome? X Chromosome
When both alleles of a gene are expressed in the offspring it is called co-dominance
An example of co-dominance is when a red flower and a white flower produce what color flower? a pink flower
What does the notation TT mean to a geneticists? two dominant alleles
What is an example of a phenotype (physical trait)? brown
Who is known as the "Father of Genetics?" Gregor Mendel
Factors that control traits are called what? genes
What do scientists call an organism that has two different alleles for a trait? hybrid
What happens during meiosis? Chromosome pairs separate and are distributed into new reproductive cells.
When sex cells combine to produce offspring, each sex cell will contribute how many chromosomes? half the number of chromosomes in body cells
What is a mutation? any change in a gene or chromosome
Created by: rachelwh
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