R
What is differentiation?
the process by which cells become specialized
What are the main stages of cell division?
Mitosis and Cytokinesis
The point on the chromosome where the two chromatids are held together is the
Centromere
Chromosomes are made up of two identical sister _____________.
Chromatids
What is the difference between phenotype and genotype?
The genotype refers to the genetic material passed between generations, and the phenotype is observable characteristics or traits of an organism.
Different forms of a gene
allele
What happens during G2 phase?
The growth period of the cell cycle, following DNA replication and preceding prophase, during which the cell forms the materials that make up the spindle.
"preparation for mitosis"
What is the difference in end products for meiosis and mitosis?
Meiosis- 4 nonidentical haploid daughter cells
Mitosis- 2 identical daughter cells
Expression of genes and genetically determined traits can be influenced by
Environmental factors
The unspecialized cells from which differentiated cells develop are known as
Stem Cells
What does a gene map show?
The relative locations of genes on a chromosome.
ABO blood group, where alleles A and alleles B are both expressed is an example of..
Codominance
The principle of dominance states that....
some alleles are dominant and others are recessive
Children born with semi-curly or wavy hair are an example of individuals exhibiting..
incomplete dominance
Offspring that result from the crosses between true-breeding parents with different traits?
Hybrids
In the P generation, a tall plant is crossed with a short plant. The probability that an F2 plant will be tall is
(percentage wise)
75%
What is a protein inherited that is displayed on our red blood cells?
Follow up who is the universal donor? universal recipient?
rH factor
Universal Donor- O-
Universal Recipient- AB+
Humans can have red blood cells that are of type A (IA), type B (IB), or type O (i) is an example of..
multiple alleles..
cyclin
Which of the following explains why normal cells grown in a petri dish tend to stop growing once they have covered the bottom of the dish?
Contact with other cells stops cell growth.
What is the female and male part of a flower?
Male- stamin
Female- Pistil
When does crossing over occur?
Prophase 1
What happens in Telophase 1?
Cytoplasm divides and 2 daughter cells are formed
A tall plant (TT) is crossed with a tall plant (Tt). What is the phenotype of the offspring?
50% homozygous dominant; 50% heterozygous; 100% tall
What is the difference between S and R strain?
Who is scientist who first did experiment?
-S strain (+ pneumonia) grew smooth colonies on culture plates
-R strain (- pneumonia) produced colonies with rough edges
* Frederick Griffith