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Genetics And Heredity
Test Description: Genes, alleles, punnett squares, inheritance
Instructions: Answer all questions to get your test result.
1) Different forms of a gene, typically represented by letters. Organisms that reproduce sexually have two alleles for every trait, one from each parent
A
DNA
B
chromosome
C
allele
D
gene
2) A dominant allele is
A
an allele that is hidden (masked) when a dominant allele is present
B
an allele whose trait always shows up in the organism when that allele is present.
3) Gene
A
The basic physical unit of inheritance
B
Thread-like molecules that carry hereditary information. They are made of protein and DNA.
C
The chemical name for the molecule that carries genetic instructions in all living things.
4) Genotype
A
An organism's physical appearance or visible traits.
B
An organism's genetic makeup or allele combinations
C
A characteristic passed from parents to offspring
5) Homozygous
A
Having two identical alleles for a trait
B
Having two different alleles for a trait
6) Heterozygous
A
Having two different alleles for a trait
B
Having two identical alleles for a trait
7) Pedigree
A
a chart that shows all the possible combinations of alleles that can result from a genetic cross
B
a chart or family tree that tracks which members of a family have a particular trait.
8) Phenotype
A
An organism's physical appearance or visible traits.
B
A characteristic passed from parents to offspring
C
An organism's genetic makeup or allele combinations
9) Punnett Square
A
a chart that shows all the possible combinations of alleles that can result from a genetic cross
B
a chart or family tree that tracks which members of a family have a particular trait.
10) An allele that is hidden (masked) when a dominant allele is present is called
A
a dominant allele
B
heterozygous
C
homozygous
D
a recessive allele
*select an answer for all questions
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