Chapter 4a Science Flashcards
Allele
Alternate form of a gene for a specific trait or gene product
Gene
What chromosomes are made of holds our traits
Heredity
Passing of genes from parent to offspring genes are expressed in offspring
Phenotype
Observable traits of offspring
Genotype
All genes that an organism has
Dominant trait
More common gene
Recessive gene
Less common gene
Ratio
Comparison between two quantities
Punnett square
Chart used to show how genes can be combined
Probability
Chance for a specific outcome will occur
Percentage
Ratio that states the number of possible outcomes out of 100 times
Gamete egg
So containing half the usual chromosomes
Sperm
Male reproductive cell
Fertilization
Part of sexual reproduction in which reproductive cells are combined to make an organism.
Meiosis
When cells divide to form sperm cells in the mail and egg cells and female
Incomplete dominance
Neither dominant nor recessive
Co dominance
Both genes are dominant
Sex linked traits
Traits carried on by sex chromosomes
Sex influenced traits
Determined by past generations
What is the difference between mitosis and meiosis?
Mitosis is when the nucleus divides. Meiosis is when cells divide to form sperm and eggs.