gregor mendel & monohybrid crosses

genetics

gregor mendel

first person to make rigorous, quantitative observations about patterns of inheritance and proposed mechanism to account for pattern

garden pea

what did gregor mendel study?

true breeding strain

term for a strain of a genetic model that has continuously reproduced the same trait

white

mendel’s F1 generation was all ____

3:1

mendel’s F2 generation had a ratio of __:__ purple to white

blending theory

The initial incorrect theory for heredity at the time of mendel

particulate theory

theory that heredity is mediated by discrete units (factors) that obey mathematical laws and each trait is represented by 2 factors, one from each parent

principle of segregation

law that states that different factors (alleles) segregate from each other in the formation of gametes such that ½ of the gametes will have one allele and the other half will have the other allele

principle of independent assortment

law that states factors for different traits are assorted independently of each other during the formation of gametes

monohybrid cross

cross where you follow one trait across generations

yes

Do you remember what homozygous and heterozygous mean? if not look it up

homozygous

recessive allele is only seen in ____ state

dominant

The following traits are ____

Tongue rolling, widows peak, free ear lobes, bent pinky finger, mid digital hair, dimples, short big toe, short index finger, and PTC taster

recessive

the following traits are ___

hitch hikers thumb and blue eyes

spermatogenesis

meiosis in males in called ____

oogenesis

meiosis in females is called ____

meiosis 2 separates identical chromatids

For a generic dominant/recessive punnet square we only include 2 chromosomes form each parent because ____

3:1

crossing heterozygotes will always produce a ____ ratio

ok

do some practice pedigree analysis if you have time