Adenine, guanine, cytosine and thymine are all examples of....
What are nitrogen bases?
100
In Mendel genetics another term for gene is...
What is an allele?
100
Meiosis has two sets of cell division. The phases, in order, are ...
What are Interphase, Prophase, Metaphase, Anaphase, Telophase, Cytokinesis (2 x)
100
In non-disjunction in which a cell has 1 too many chromosomes it is called...
What is trisomy?
100
The term used to describe the trait that is seen or expressed such has brown eyes or blond hair is called...
What is phenotype?
200
DNA is the short form for this....
What is DEOXYRIBONUCLEIC ACID?
200
The trait that is expressed over another (or masks another trait) is referred to as...
What is a dominant trait?
200
Two things that occur in meiosis that do not in mitosis include...
What are homologues tetrads, crossing over of DNA, two sets of cell division, half number of chromosomes at end
200
A nondisjunction disorder in which there is an extra chromosome on set 21 in humans is called...
What is Down's syndrome?
200
The phase of cell division in which chromosomes line up along the middle of the cell is called...
What is mitosis?
300
DNA are composed of nucleotides with is made up of these three parts...
What are a nitrogen base, phosphate group and a 5 ringed ribose molecule
300
If an organism has the same alleles, either dominant or recessive they are referred to as...
What is homozygous?
300
If a dog has 42 chromosomes in its skin cells, it would have this many chromosomes in its sperm.
What is 21 or the haploid number or n?
300
There is a disorders in females in which they have only one X chromosome and not 2. It is called....
What is Turner Syndrome?
300
A section of a chromosome that is the DNA code for a trait such as widow's peak or blood type is called...
What is a gene?
400
Adenine always matches with thymine in DNA but this base pair is different in RNA. Adenine pairs up with ...
What is uracil?
400
In humans, tongue rolling is dominant to non-tongue rolling. If a heterozygous tongue roller has a child with a non-tongue roller what percentage chance does their child have of being a non-tongue roller?
What is 50%?
400
In what phase of meiosis do sister chromatids get pulled apart?
What is anaphas 2?
400
In some cases the DNA of one chromosome will somehow become attached to another chromosome which could cause deformities. This is called...
What is translocation?
400
In genetic problems solving a capital letter such as B for brown eyes represents a _______________ allele or trait
What is a dominant allele?
500
DNA is used as a code to produce proteins. Its message must be sent outside the nucleus to this organelle to produce these proteins
What is a ribosome?
500
In a certain plant red is dominant and white is recessive. If the gardener wants to produce cross her plants but still have both colours the genotypes of these plants should be....
What is heterozygous red and homozygous white?
500
three differences in the end product of meiosis and mitosis are...
Meiosis produces 4 cells, mitosis produces 2, mieosis cells have half the number chromosomes, mitosis the same. Each of the 4 cells in meiosis are genetically different. Both cells in mitosis are genetically the same.
500
In most humans 46 is the correct number of chromosomes. If a human has 45 this means on set of chomosomes is one short. This is called
What is monosomy?
500
Two chromosomes that control the same trait (one from mom and one from dad) are called...