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» MONOHYBRID» ALLELE» DOMINANT» RECESSIVE» HOMOZYGOUS» HETEROZYGOUS» GENOTYPE» PHENOTYPE
SHORTTALL X
ALL TALL
PARENTS
OFFSPRING
» MONOHYBRID – Following one trait» ALLELE» DOMINANT» RECESSIVE» HOMOZYGOUS» HETEROZYGOUS» GENOTYPE» PHENOTYPE
SHORTTALL X
ALL TALL
PARENTS
OFFSPRING
TT tt
Tt
SHORTTALL X
ALL TALL
PARENTS
OFFSPRING
TT tt
Tt
T tGAMETES
» MONOHYBRID – Following one trait» ALLELE – One form of a gene» DOMINANT» RECESSIVE» HOMOZYGOUS» HETEROZYGOUS» GENOTYPE» PHENOTYPE
» MONOHYBRID – Following one trait» ALLELE – One form of a gene» DOMINANT – Trait that always shows up» RECESSIVE» HOMOZYGOUS» HETEROZYGOUS» GENOTYPE» PHENOTYPE
» MONOHYBRID – Following one trait» ALLELE – One form of a gene» DOMINANT – Trait that always shows up» RECESSIVE – Trait that can hide» HOMOZYGOUS» HETEROZYGOUS» GENOTYPE» PHENOTYPE
GAMETES GO HERE
OFFSPRING GO HERE
T T
t Tt Tt
t Tt Tt
» MONOHYBRID – Following one trait» ALLELE – One form of a gene» DOMINANT – Trait that always shows up» RECESSIVE – Trait that can hide» HOMOZYGOUS – Has the same alleles» HETEROZYGOUS» GENOTYPE» PHENOTYPE
» MONOHYBRID – Following one trait» ALLELE – One form of a gene» DOMINANT – Trait that always shows up» RECESSIVE – Trait that can hide» HOMOZYGOUS – Has the same alleles» HETEROZYGOUS – Has different alleles» GENOTYPE» PHENOTYPE
TALLTALL X
???????
PARENTS
OFFSPRING
TALLTALL XPARENTS
Tt Tt
T tGAMETESt T
TALLTALL XPARENTS
OFFSPRING
Tt Tt
T tGAMETESt T
TT TALL
TALLTALL XPARENTS
OFFSPRING
Tt Tt
T tGAMETESt T
Tt TALL
TALLTALL XPARENTS
OFFSPRING
Tt Tt
T tGAMETESt T
tt SHORT
T t
T
t
T t
T TT Tt
t Tt tt
» MONOHYBRID – Following one trait» ALLELE – One form of a gene» DOMINANT – Trait that always shows up» RECESSIVE – Trait that can hide» HOMOZYGOUS – Has the same alleles» HETEROZYGOUS – Has different alleles» GENOTYPE – GENE TYPE (the letters)» PHENOTYPE
» MONOHYBRID – Following one trait» ALLELE – One form of a gene» DOMINANT – Trait that always shows up» RECESSIVE – Trait that can hide» HOMOZYGOUS – Has the same alleles» HETEROZYGOUS – Has different alleles» GENOTYPE – GENE TYPE (the letters)» PHENOTYPE – WHAT IT LOOKS LIKE
T t
TTT
tall
Tt
tall
tTt
tall
tt
short
T t
TTT
Homozygous dominant
TtHeterozygous
t TtHeterozygous
ttHomozygous
recessive
» In pea plants, round seeds are dominant to wrinkled seeds. If a heterozygous round seed plant is crossed with a heterozygous round seed plant, what is the expected phenotypic and genotypic ratios in the F1 ?
R rR
r
RR Rr
Rr rr
Phenotypic Ratio: 3 round : 1 wrinkled
Genotypic ratio: 1 RR : 2 Rr : 1 rr
P – Rr x RrAlleles produced for gametes are R and r from each parent
Fruit fly wing length is controlled by a dominant allele for long wings (L). If a heterozygous long winged fly is mated to a homozygous long winged fly, what is the expected phenotypic and genotypic ratio in their offspring?
AMOROSO, Gian Anthony E.ARTILLERO, Hans Juris A.ARBATIN, Jasselle Marie D.ASIGNACION, Joni Jane E.ASIS, Mary Beatrix R.
BEJO, Joy A.BENGAN, Tricia Kay B.
SSTC – IV – Einstein
