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Genetics

QuestionAnswer
Geneotype refers to an organisms.... alleles or the letters of their genes
phenotype refers to an organisms... looks or whether or not they express that trait
what is a punnet square? a tool in genetics used to predict the outcome of crosses
how many sex chromosomes in a human are there? 2
how many regular chromosomes in a human are there? 44
what are chromosomes made of? DNA and proteins
where are chromosomes found? in the nucleus of a cell
who is the monk known as the "father of genetics"? Gregor Mendel
what is genetics? the study of heredity
what is heredity? how traits are passed from parents to offspring
what are offspring? children/babies
what is a pedigree? a tool in genetics used to see how traits are inherited in families
what does homozygous mean? both alleles are the same
what does heterzygous mean? the alleles are different
what does homozygous dominant mean? both alleles are dominant
what does homozygous recessive mean? both alleles are recessive
what does a carrier mean? one allele is dominant and one is recessive
if a disorder is recessive will a carrier have that disorder? no
if a disorder is recessive will someone that is homozygous recessive have that disorder? yes
what is an allele? a version of a trait
how many alleles for a trait do you receive from your mom? one
what does sex-linked mean? it means the trait or disorder is linked to a sex chromosome
what sex chromosomes do men have? XY
what sex chromosomes do women have? XX
Which sex chromosome carriers so few genes that we do not put letters after it in punnet square problems? Y
in a pedigree circles represent? females
in a pedigree squares represent? males
in a pedigree when a circle and square are linked by a horizontal line this shows marriage
in a pedigree if there are two rows of circles and squares how many generations are there? two.
Created by: ruth.baker
 

 



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