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JAG6-Genetics Unit
Heredity and Genetics
23
Science
6th Grade
03/04/2009

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Term
heredity
Definition
the passing of traits from one generation to the next
Term
dominant
Definition
form of the trait that appears in the hybrid generation
Term
recessive
Definition
form of the trait that is masked/hidden in the hybrid generation
Term
gene
Definition
a portion of the cell's chromosomes that controls a particular trait
Term
inherited trait
Definition
characteristic that is passed from parent to offspring
Term
Punnett square
Definition
table used to predict the outcome of different forms of a trait
Term
DNA
Definition
molecule that contains the code that tells each cell how to operate
Term
genetic engineering
Definition
changing the DNA sequence to produce a particular trait
Term
pollination
Definition
transfer of pollen grains from the male part of the flower to the female part of the flower
Term
genetics
Definition
the study of how heredity works
Term
gene splicing
Definition
taking genes from one organism and attaching them to another organism
Term
pedigree
Definition
chart used to trace the history of a trait
Term
X and Y chromosomes
Definition
sex chromosomes (XX-female and XY-male)
Term
offspring
Definition
children
Term
George Washington Carver
Definition
plant breeder, agriculturalist, and scientist who improved the cotton plant
Term
hybrid
Definition
having two different forms of the same trait
Term
Gregory Mendel
Definition
monk who studied pea plants and is known as "the Father of genetics
Term
purebred
Definition
having two of the same form of a trait
Term
sex-linked traits
Definition
traits determined by sex-linked genes like color blindness or hemophilia
Term
carrier
Definition
organism that has the factor for a trait but does not show the trait
Term
chromosomes
Definition
strands in the nucleus made of DNA
Term
selective breeding
Definition
crossing plants or animals to produce offspring with particular traits
Term
fertilization
Definition
joining of male and female sex cells
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