reproduction Flashcards
give example on how organisms reproduce asexually
plants
what is meant by the term species
a group of living organisms that can reproduce
what are the structures in the nucleas that carry instructions for characteristics
chromosones
name the chemical that carries out these instructions
DNA
explain the term genotype
a collection of allelies that determine the phentotype
explain the term phenotype and an example
a small section of DNA on a chromozone that codes for a specific protein eg:eye colour
name the unit of DNA that contols a characteristic
a gene
what is a dominant gene
when the gene is more dominant-it is more likely to be the gene the baby carries out
what is a recessive gene
when the gene is less dominant to be the gene the baby carries out
how many genes do cells carry for each characteristic
2
how many genes do gametes carry out for each characteristic
1
what is mesant by mutation
any change in the DNA sequence of a cell
what is evolution
the change in the characteristics of a species over generations and relys on natural selection
give an example of variations in a predotar and how it would improve its chance of survival
a predator may attack larger groups with a higher frequency
what is natural selection
genetic mutations that are beneficial to an individuals survival are passed through reproduction