mendel six terms Flashcards
(14 cards)
step 1
Produced a “true-breeding” population called the “P” generation by self-pollinating plants with the desired trait.
step 2
Produced a “F1” generation by cross-pollinating the P generation
step 3
Produced a “F2” generation by self-pollinating the F1 generation
results
P Generation: Purple x White
F1 Generation: 100% Purple
F2 Generation:
705 Purple & 224 White
Ratio of purple to white 3:1
chart
Trait
F2 results
Ratio
Flower color
705 purple, 224 white
3 : 1
Seed color
6,022 yellow, 2,001 green
3 : 1
Pod color
428 green, 152 yellow
3 : 1
Pod shape
882 inflated, 299 constricted
3 : 1
Flower position
651 side, 207 top
3 : 1
Plant height
787 tall, 277 dwarf
3 : 1
allele
One of two (or more) forms of a gene.
Each individual has two alleles per trait.
Each parent will pass one allele to the offspring.
The F2 generation will produce
3:1 ratio
dominant
The genetic trait that is expressed when its allele is present.
Capital letters (Ex: B)
recessive
The genetic trait that is hidden when the dominant allele is present.
Lowercase letters (Ex: b)
phenotypes
The physical appearance of an organism.
Word descriptions (Blue eyes, black hair)
genotype
The genetic makeup of an organism
Letters (BB, Bb, bb)
homozygous
Genotype that has two IDENTICAL alleles for a trait
Two types: BB (homozygous dominant) or bb (homozygous recessive)
heterozygous
Genotype that has two DIFFERENT alleles for a trait
Ex: Bb
practice all six terms
Dominant
Recessive
Phenotype
Genotype
Homozygous - GG, gg
Heterozygous - Gg