Genetics 1
Genetics 2
Genetics 3
Genetics 4
Genetics 5
100

What type of inheritance do two alleles have if their traits blend together?

Incomplete Dominance

100
The possible offspring of a genetic cross are often shown with diagrams called ____________.
Punett Squares
100

What is the term for a genotype where only dominant alleles were passed on from both parents for one trait

ex. BB AA TT LL

homozygous dominant

100

Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?

25%

100
The three-nucleotide sequence in messenger RNA that specifies a particular amino acid is called a _______.  
Codon
200
Two species with the following alleles for color are crossed. The alleles are B and b to indicate the presence of a particular color or not. Show an offspring with heteroxygous and homozygous recessive genes.
Bb bb
200

When one allele is not dominant over another, resulting in a blended phenotype for heterozygous offspring is considered....

Incomplete Dominance

200

What do you call the physical expression of a gene?

phenotype

200
What is Replication?
Replication: Process by which the DNA makes exact copies of itself.
200

An organism that has one dominant allele and one recessive allele

heterozygous

300
During synapsis in the first meiotic division, the chromatids of a pair of homologous chromosomes often twist around each other, break, exchange segments, and rejoin. This exchange of segments is called ______, and results in a rearrangement of linked genes and produces _________ in offspring.
crossing-over, variations
300
In a test cross, the organism in question is crossed with a homozygous recessive organism. a) If the test organism is homozygous ___________, all offspring will be heterozygous and show the dominant phenotype. b) If any of the offspring shows the recessive phenotype, the individual being tested is ___________.
a) dominant b) heterozygous
300
DNA molecules are very large; each is made up of thousands of repeating units called ________.
nucleotides
300
State the ways the four nitrogenous bases of DNA nucleotides bond together.
The four nitrogenous bases of DNA nucleotides bond together in only one way: * Adenine (A) pairs with thymine (T), by a double hydrogen bond; * Cytosine (C) pairs with guanine (G), by triple hydrogen bond.
300
Ribosomal RNA is found in the ribosomes, which are the sites of ________ synthesis.
protein
400
In the inheritance of some traits there are more than two different alleles for the trait, which are known as multiple alleles. However, no more than ____ alleles for a trait can be present in a cell. This means that while there may be three or more different forms of a gene for a particular trait, any given organism can have only ____ of them.
two, two
400

Dominant alleles are represented by a(n)

uppercase/capital letter

400
State the three parts a DNA nucleotide is composed of.
a phosphate group; a molecule of the 5-carbon sugar deoxyribose; and a nitrogenous base.
400

Georgette wants to breed her pet phoenixes, but she isn't sure if the babies will burst into blue flames or red flames. Her documents show that her female phoenix is homozygous dominant for red flames, while her male phoenix is homozygous recessive for blue flames. What color flames will the babies have?

Red

400

an organism's genetic makeup

genotype

500

In mice coat color is incompletely dominant. Black and white are homozygous. Brown mice are heterozygous.

What is the genotype for a brown mouse?

Bb

500
_____ of the chromosomes is the genetic material that is passed from generation to generation. DNA controls cellular activities by controlling the production of _________.
DNA, Proteins
500
There are four different nitrogenous bases found in DNA nucleotides __________, _________, _________, and __________. Therefore, there are four different types of nucleotides, depending on which base is present.  
Adenine, Cytosine, Guanine, Thymine
500
State the three kinds of RNA molecules in cells.
Messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA).
500
What is a polypeptide?
It is a chain of amino acids.
M
e
n
u