Punnett Squares
In rabbits, the allele for black (B) hair is dominant & white (b) hair is recessive,cross a heterozygous black haired rabbit and a white haired rabbit.
What percentage of the offspring will have black hair?
50%
What does a circle represent in a pedigree?
Female
What molecules make up a nucleotide?
Ribose sugar, phosphate group, nitrogen base
What type of cell division creates gametes?
Meiosis
What is a substitution mutation?
In cattle, red (R) and white (W) are pure-breeding colors, while hybrids are called roan (RW). If a red bull is crossed with a white cow, what will be the phenotype of the offspring?
100% RW
What does a square represent in a pedigree?
Males
What nitrogen bases pair together in DNA?
Cytosine and Guanine, Thymine and Adenine
What type of cell division makes clones?
Mitosis
What is a frameshift Mutation?
When a nitrogen base is inserted or deleted.
A widow’s peak hairline is dominant to straight hairline. Cross a heterozygous widow’s peak hairline person to a straight hairline person.
What percent of offspring will have straight hair?
50%
Use the pedigree from your study guide.
How many children do parents II3 & II4 have?
2
What is the monomer to proteins?
Amino acids
What is the purpose of mitosis?
Growth and repair
What is a silent mutation?
When the amino acid sequence does not change.
Coat color in mice are incomplete dominance. Yellow(Y) and white (W) colored mice are homozygous, while cream colored mice are heterozygous(YW). If two cream colored mice mate. Give the genotypes and phenotypes % of each trait.
YY=25%=Yellow, YW=50%=Cream, WW=25%=White
Use the pedigree from your study guide.
How many daughters do parents I1 and I2 have?
2
Long and thread-like DNA in a non-dividing cell is called?
chromatin
Diploid cells=(2N) Haploid cells=(N)
If and organism has a diploid # of 24, how many chromosomes are found in their haploid cells?
12
Name the mutation that changes the amino acid in a point mutation.
Missense
Human blood types are determined by genes that follow codominance patterns. (A + B) are dominant (o) is the recessive allele. Cross a heterozygous A blood type with a homozygous B blood type.
What percent will give A type blood?
0%
Which individuals are affected in ALL generations?
I2, II3, II5, III3, III4, III5
Doubled, coiled, short DNA in a dividing cell is called?
chromosome
In which phase does DNA replication occur?
“S” phase in interphase
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