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Biology: Unit 4
Flashcards reviewing Biology Unit 4.
24
Biology
10th Grade
01/22/2011

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Term
a specific form of a gene
Definition
allele
Term
an identifiable or measurable feature of an organism, such as size, color, or texture
Definition
characteristic
Term
a segment of DNA that directs the development of some inherited traits
Definition
gene
Term
the passing of genetic information from parents to their offspring
Definition
heredity
Term
the specific observable form of a character, such as tall for height, pink for flower color, or smooth for seed texture
Definition
trait
Term
___'s study of heredity established the field of modern genetics
Definition
Gregor Mendel
Term
Gregor Mendel experimented with ___ in his garden.
Definition
pea plants
Term
Mendel showed that alleles of different genes assort ___ during gamete formation.
Definition
independently
Term
genes associated with different characteristics assort independently of one another during gamete formation
Definition
law of independent assortment
Term
a characteristic of a trait, or of the allele associated with that trait, in which the trait is expressed even if only one copy of the allele is present
Definition
dominant
Term
the particular alleles present in an organism for a character or set of characters
Definition
genotype
Term
having two different alleles for a gene being considered
Definition
heterozygous
Term
having two identical alleles for a gene being considered
Definition
homozygous
Term
the physical or detectable traits of an organism
Definition
phenotype
Term
a characteristic of a trait, or of the allele associated with that trait, in which the trait is expressed only if two copies of the allele are present
Definition
recessive
Term
____ help you understand different patterns of inheritance
Definition
genetic crosses
Term
____ are used to predict offspring and phenotypes.
Definition
Punnett squares
Term
True or False?
Alleles segregate during meiosis.
Definition
true
Term
A ____ letter represents an allele for trait that is dominant over another trait.
Definition
uppercase
Term
The trait that is not dominant is recessive and its allele is represented by a ___ letter.
Definition
lowercase
Term
The combination of alleles governing a certain trait in an organism is called the organism's ____.
Definition
genotype
Term
An organism's genotype let's you predict its ____.
Definition
phenotype
Term
a diagram that shows how a trait is passed throughout a group of related individuals over many generations
Definition
pedigree
Term
____ use symbols to discover inheritance patters and track family traits.
Definition
pedigrees
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