Genetics 1
The characteristics of an organism.
What are traits?
This gene always shows is self over a recessive gene
What is a dominant gene?
All human cells contain _________ chromosomes
What is 46?
Organized display of an organism's chromosomes.
What is karyotype?
a capital letter represents what type of trait?
What is a dominant trait?
The passing of traits from parent to offspring is called.
What is heredity?
This describes two of the same copies of a gene
What is homozygous?
One of two or more forms of a particular gene
What is an allele?
What's another word for homozygous?
purebred
Heterozygous parents are crossed. What percent of offspring will be homozygous dominant?
What is 25%?
What does DNA stand for?
Deoxyribonucleic Acid
This describes different alleles for the same trait.
what is heterozygous?
What's another word for heterozygous?
hybrid
Where are chromosomes located?
What is the nucleus?
What percent of the offspring of a cross of heterozygous parents will be homozygous?
What is 50%?
Chromosomes are made up of coiled strands of _______.
What is DNA?
A model that shows possible gene combinations.
What is a Punnett square?
Examples would be eye color, hair color, height
traits
alleles of a trait that are hidden when the dominant allele is present
What is a recessive allele?
What percent of the offspring of a cross of heterozygous parents will be heterozygous?
What is 50%?
Sequence of bases in DNA create a _____.
Gene
In a pedigree, what would a half shaded square represent?
male who is heterozygous for trait or carrier
What does trisomy and monosomy mean?
3 chromosomes (one extra)
1 chromosome (one missing)
What percentage of two homozygous recessive parents will be heterozygous?
What is zero percent?
What percent of the offspring of heterozygous parents will be homozygous recessive?
What is 25%