Final Flashcards
(24 cards)
Heritable features that vary
Characters
Combination of the alleles
Genotype
Visible traits (determined by genotype)
Phenotype
Both alleles are identical
Homozygous
Alleles are different
Heterozygous
DNA is a _______
Nucleic acid
T pairs with ____
G pairs with _____
A pairs with ______
C pairs with ______
A
C
T
G
What lays down the initial sequence of rna so DNA replication can begin
Primase
What “cuts” apart the hydrogen bonds of the original DNA so replication can begin
Helicase
Which of the following is responsible for keeping the nitrogen bases from reforming their hydrogen bonds during DNA replication
Single stranded binding proteins
Which way does the leading strand go
Unwinding 3-5
Which way does lagging strand go
5-3
The 3’ carbon is attached to the ____
Phosphate that is apart of the adjacent nucleotide
When DNA replicates
Each daughter double helix contains one new strand of DNA and one old strand
Which if the following is used to “glue” together separate sequences of DNA
Ligase
Nucleotides are composed of …
Sugars and nitrogen bases
Which of the following is a dihybrid cross Aa BbRr Xy Xxyy
Xy
What is homozygous dominant
Two big letters
What is homozygous recessive
Two small letters
What is heterozygous
Combination of both big and small letters
The boxes in the punnet square represent
Potential offspring genotypes
Black fur is dominant over white fur. If two heterozygous individuals mate, what would be the expected phenotypic ratio of the offspring
3:1
Black fur is dominant over white fur. If the homozygous dominant individual mates with a heterozygous individual, what would the expected phenotypic ratio
4:0
Normal vision (CB) is dominant over colorblind (cb) if a normal visioned female and a colorblind make have a colorblind daughter. What was the mothers genotype
XCB Xcb
