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Inheritance and vari

Ch 10

QuestionAnswer
sexual reproduction involves two parents where the male and female gametes join together to form a zygote
Asexual reproduction involves one parent with the offspring having identical genetic information to the parent
Strawberry plants reproduce asexually using runners
an example of a single celled organism is an Amoeba
a species is a group of organisms that can breed with each other and produce fertile offspring
Differences between members of the same species is called Variation
fertile means that an organism is capable of producing young
a mule is an example of a hybrid organism
DNA is also called Deoxyribonucleic Acid
DNA structure was discovered by Watson and Crick
Scientist who did X ray analysis of DNA Rosalind Franklin
The shape of DNA is described as a double helix
the sides of the helix are made of sugar and phosphate
the steps of the helix are made of Bases
how many bases exist 4
The base adenine pairs with Thymine
The Base Guanine pairs with Cytosine
Chromosomes are made of lengths of DNA wrapped around proteins
pairs of chromosomes in humans 23
females have two X chromosomes
males have one X chromosome and 1 Y Chromosome
Genes are Lengths of DNA along the chromosome
Genes control which protein is made
Junk DNA does not code for anything
a human egg cell and a human sperm cell each have 23 chromosomes
number of genes humans have 25,000
how many genes do we have for each trait 2
Scientist known as the father of genetics Gregor Mendel
inheritance is the way traits are passed from parents to offspring
inherited traits are things like eye colour, hair colour and blood type
non inherited traits are things like cycling, football and language
Expressed means that the protein a gene is controlling is made
genotype refers to the genes an organism posesses
Phenotype refers to the traits that can be seen in an organism
a dominant gene prevents another gene from working
a recessive gene may be carried but might not be expressed
Created by: PHealy
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