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Biology Flashcards




One of a number of different forms of a gene

Asexual reproduction

process of reproduction involving a single parent

Binary Fission

type of asexual reproduction in which an organism replicates its DNA and divides in half, producing two identical daughter cells.



Chromosome Number


Crossing over

Process in which homologous chromosomes exchange portions of their chromatids during meiosis.

Dominant traits



Process in sexual reproduction in which male and female reproductive cells join to form a new cell.


Sex cell


Sequence of DNA that codes for a protein and thus determines a trait; factor that is passed from parent to offspring.

Genetic cross



Genetic makeup of an organism


Having two different alleles for a particular gene


Having two identical alleles for a particular gene.


Process in which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell.


Part of eukaryotic cell division during which the cell nucleus divides.




Chart that shows the presence or absence of a trait according to the relationships within a family across several generations.


Physical characteristics of an organism

Protein synthesis


Punnet Square

Diagram that can be used to predict the genotype and phenotype combinations of a genetic cross.

Recessive traits



Process of copying DNA prior to cell division


Cell organelle consisting of RNA and protein found throughout the cytoplasm in a cell; the site of protein synthesis.

Sex-linked Traits


Sexual reproduction

Type of reproduction in which cells from two parents unite to form the first cell of a new organism.


Fertilized egg

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