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6th Grade 2nd nine weeks test (Science)
Terms in this set (34)
The passing of traits from parent to offspring.
A trait observed when at least one dominant allele for a characteristic is inherited.
A trait that is apparent only when two recessive alleles for the characteristic are inherited.
Segments of DNA that carry hereditary instructions located on chromosomes and passed from parent to offspring.
Alternative forms of a gene that govern the same characteristics.
The inherited combination of alleles.
An organism's inherited appearance.
The mathematical chance that an event will occur.
Eggs or sperm; a sex cell carries half the number of chromosomes found in other body cells.
Chromosomes with matching information.
Cell division that produces sex cells.
Chromosomes that carry genes that determine the sex of offspring.
hereditary material that controls all the activities of a cell, contains the information to make new cells and provides instructions for making proteins
a subunit of DNA consisting of a sugar, a phosphate, and one of four nitrogenous bases
one of the four bases that combine with sugar and phosphate to form a nucleotide subunit of DNA; adenine pairs with thymine
one of the four bases that combine with sugar and phosphate to form a nucleotide subunit of DNA; thymine pairs with adenine
one of the four bases that combine with sugar and phosphate to form a nucleotide subunit of DNA; guanine pairs with cytosine
one of the four bases that combine with sugar and phosphate to form a nucleotide subunit of DNA; cytosine pairs with guanine
a small organelle in cells where proteins are made from amino acids
a change in the order of the bases in an organism's DNA; deletion, insertion, or substitution
anything that can damage or cause changes in DNA
a diagram of family history used for tracing a trait through several generations
a hereditary characteristic that helps an organism survive and reproduce in its environment
the most specific of the seven levels of classification; characterized by a group of organisms that can mate with one another to produce fertile offspring
the process by which populations accumulate inherited changes over time
the solidified remains or imprints of once-living organisms
a historical sequence of life indicated by fossils found in layers of the Earth's crust
the remnant of a once-useful anatomical structure
distinguishing qualities that can be passed from one generation to another
breeding of organisms that have a certain desired trait
the process by which organisms with favorable traits survive and reproduce at a higher rate than organisms without the favorable trait
a change in the order of the bases in an organisms's DNA; deletion, insertion, or substitution
the period between the birth of one generation and the birth of the next generation
the process by which two populations of the same species become so different that they can no longer interbreed
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