Vocabulary
Mendel's Principles
Using the Punnett Square
Mystery
Fill in the blank
1
having 2 of the same alleles AA or aa
What is homozygous?
1
some alleles are dominant and some are recessive
What is the principle of dominance?
1
Brown (B) is dominant fur over silver-blue fur (b) in minks. If a homozygous brown mink is mated with a silver-blue mink, and 10 offspring are produced, how many will be expected to be silver-blue? Why?
0 because in order to be silver-blue, two b alleles have to be inherited.
1
father of genetics
Who is Gregor Mendel?
1
Mendel's factors are called ______.
What is genes?
1
factor passed from parent to offspring
What is a gene?
1
alleles separate during meiosis, offspring will inherit one allele for each trait from each parent
What is the principle of segregation?
1
A heterozygous tall plant is allowed to self-pollinate. What are the possible genotypes of the offspring? What percent are expected to be tall? What percent are expected to be short?
The genotypes of the offspring are TT, Tt, tt. 75% tall 25% short
1
Mendel used pea plants to study ______ of traits.
What is inheritance?
1
The haploid number is 8, so the diploid number is ___.
What is 16?
2
an inheritable characteristic
What is a trait?
2
genes on different chromosomes will most likely be randomly distributed during meiosis
What is independent assortment?
2
What are the allele combinations of the gametes produced by an individual with a genotype, AaBb?
AB Ab aB ab
2
Offspring that result from crosses between true-breeding parents with different traits are called _________.
What are hybrids?
2
Gametes are produced by a process called ______.
What is meiosis?
3
the actual genes of an organism such as PP, Pp, or pp
What is a genotype?
3
Purple (P) white (p) A pure-breeding purple is cross-pollinated with a pure-breeding white? A. What phenotype will the offsprings have? B. What genotype will the offsprings have?
What is A. purple B. Pp
3
What are the genes contained in the gametes of an heterozygous individual producing purple flowers?
P or p
3
The principles of ______ can be used to predict the traits of the offspring of a genetic cross.
What is probability?
3
The ________ __________ is used to show the results of a genetic cross, the genotypes of the offsprings and the alleles for each parent.
What is the Punnett square?
4
the outward expression of the genes such as purple or white flowers
What is a phenotype?
4
In mice, white (W) is dominant over brown (w), how can 2 white mice produce a brown mouse? What are the genotypes of each parent? What is the genotype of the brown offspring?
Each white mouse is heterozygous (Ww). Ww x Wx The genotype of the brown offspring is ww.
4
How many squares would the Punnett square contain for a cross between AaBb x AaBb? What fraction will be aabb?
16 squares 1/16
4
study of heredity
What is genetics?
4
Organisms with different alleles for a particular trait are said to be _________________.
What is heterozygous?
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