Chapter 12 Flashcards
Early botanists produced
Hybrids
Hybrids
crosses between two true-breeding plants
In the 1900’s,
Mendel studied pea plants
List 4 reasons of why Mendel studied pea plants
- Hybrids could be produced
- Many “varieties” were
available - They were small and easy
to grow - They can self-fertilize or
be cross-fertilized
Mendel produced ___ -___ ___ for many traits
True Breeding Strains
cross true-breeding strains having alternate
forms of a trait to produce ___
Hybris
Mendel produced true-breeding pea strains
for _ diffrent traits,each trait with _ alternate forms
7,2
Explain Mendel’s Monohybrid Cross
studies 2 forms of a trait
Describe Mendel’s F1 Generation
“hybrid”
offspring produced by crossing 2 true-breeding
strains
Monohybrid Cross, Dominant ( explain )
the form of each trait seen in the
F1 plants (e.g, blue flower color)
Monohybrid Cross, Recessive
the form of the trait that
“disappeared” in the F1 plants (e.g., white
flower color)
gene
section of a chromosome that codes for a
particular trait
alleles
alternate forms genes that occur on
homologous chromosomes
homozygous
having all of the same allele
heterozygous
having different alleles
Genotype
the alleles carried by an individual
RR is ___ ___
heterozygous dominant
Rr is ___
heterozygous
rr is __
homozygous recessive
phenotype is also known as
outside appearance
If an individual is heterozygous, half of its gametes
will have the
dominant allele, other half is recessive
If an individual is homozygous, all of its gametes
will have the
same form of the allel
Punnett squares
can be used to
predict offspring genotypes
In a monohybrid cross, one
parent is
homozygous recessive, and one is homozygous dominant
