Vocabulary
This allele completely masks the expression of the other in a heterozygous genotype
What is the dominant allele?
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.
factor passed from parent to offspring
What is a (allele for a) gene?
What type of organism did Mendel study?
What are pea plants?
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
How many traits are considered in a Dihybrid Cross?
What is 2?
A characteristic that may be inherited
What is a trait?
This generation is the result of crossing two individuals from the F1 generation.
What is the F2 generation?
What are the allele combinations of the gametes produced by an individual with a genotype, AaBb?
AB Ab aB ab
Offspring that result from crosses between true-breeding parents with different traits are called _________.
What are hybrids or heterozygotes?
What is the probability of having 3 sons in a row?
What is 1/8?
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
What are the allele(s) contained in the gametes of an heterozygous individual producing purple flowers? Use P for purple and p for white.
P or p
The principles of ______ can be used to predict the traits of the offspring of a dihybrid cross using the Bostick easy method.
What is probability?
The ________ __________ is used to show the results of a genetic cross, predicting the genotypes of the offspring using the alleles for each parent.
What is the Punnett square?
the physical appearance (expression) of the genes such as purple or white flowers
What is a phenotype?
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.
What is it called when you cross an individual with an unknown dominant genotype with a homozygous recessive individual to determine the unknown genotype.
What is a test cross?
B = Blue eyes b = white eyes, F = Fur f = no fur
BbFf x Bbff, how many of 16 offspring will have Blue eyes but no fur?
What is 2/16?