DNA
The bases of DNA are made out of what element?
Nitrogen
What is the purpose of Meiosis
Sexual Reproduction
What is the purpose of Mitosis
Growth and Repair
Different forms of the same gene are called what?
Alleles
rr, ss, vv are examples of what?
Homozygous Recessive
X-RAY
How many divisions occurs in Meiosis?
Two
How many divisions occurs in Mitosis?
One
Define and give examples of the word phenotype
Physical appearance; freckles, tall, color
In genotypes like Rr, Tt, Gg, Ll, will the dominant trait show or the recessive?
What is the shape of DNA?
Double Helix
How many daughter cells are produced in Meiosis? Are they identical or unidentical?
4 unidentical daughter cells
How many daughter cells are produced in Mitosis? Are they identical or unidentical?
2 identical daughter cells
Define genotype and give examples
Genetic makeup; Gg, xx, Tt
If a purebread dominant tall plant crosses with a hetrozygous tall plant, what will the offspring's alleles look like?
TT,TT,Tt,Tt
The sides of the double helix are made out of what?
Sugar and Phosphates
A haploid cell has how many chromosomes? Diploid?
23;46
The two main components of the cell cycle are what?
Interphase and Mitosis
What kind of trait will ALWAYS mask another?
Dominant trait.
Ex. RR or Tt
If two heterozygous no freckled parents cross, what is the percentage their offspring will have a child with freckles?
25%
Out of the 4 nitrogen bases listed, which bases pair together? Guanine, Adenine, Thymine, Cytosine.
Adenine and Thymine; Guanine and Cytosine
A zygote is defined as what?
A fertilized egg
What are the 3 stages of the cell cycle?
Interphase, Mitosis, and Cytokinesis
What occurs in Interphase?
1. Cell matures
2. Replication of DNA
In rats, black fur (B) is dominant over white fur (b). Design a Punnett square to demonstrate the possible outcome if a purebred black rat is crossed with a purebred white rat.
What is the probability the offspring will have white fur?
0%