Unit 8 Introduction to genetics Flashcards
What is genetics the study of?
Herdity
What is Heredity?
The passing of characteristics (traits) from parent to offspring
What is genetics
the study of how traits are passed don from 1 gent to the next
What are all chromosomes made of?
DNA wrapped around a protein
What is a gene?
A section of DNA found on the chromosome
What do genes determine?
Traits
What do all Chromosomes have?
Genes
What is a trait?
A characteristic of an individual (Eye color, height, hair color)
Who was the 1st person to study genetics?
Gregor Mendel
What is Gregor Mendel known as?
Father of modern genetics
What did Mendel study?
Pea plants
How many traits did Mendel find in pea plants?
7
What did Mendel find out about pea plants traits?
They had contrasting characteristics.
Did Mendel cross pea plants with contrarting characterstics or regular characteristics?
Contrasting
What are offspring of crosses called?
Hybrids
Mendel crossed a tall plant and a small plant. The offspring were all tall. Which trait it Dominant and which is Recessive?
Dominant- Tall
Recessive- Short
what are an individual characteristics determined by?
genes passed from 1 gen to the next
What is the principle of dominance?
Some traits are dominant some are reccessive
What is a dominant trait?
the strong trait
What are Recessive traits?
The weak traits
What did Mendel Learn?
Traits are passed from parent to offspring from one generation to the next
Dominant traits are mask Recessive traits
Your mom is heteroxygous for brown eyes. Your dad is homozygous recessive for blue eyes. What is the chance that their child will have blue eyes?
What is an Allele?
A form of a gene
How many alleles does every 1 gene have?
2
