Genetics are cool
What was the main conclusion of Mendel's pea plant study?
Dominant and recessive traits.
If a snake has 36 chromosomes in it's body cells, how many chromosomes did it inherit from the father snake?
18
How could you describe the genetic makeup of an organism that was produced through asexual reproduction?
Genetically identical to the parent organism
What is heterozygous?
One dominant allele one recessive allele
Where is DNA and chromosomes found within the cell?
The nucleus
Since the small intestine is an organ it is smaller than an organ system but larger than cells and tissue.
*organelle, cell, tissue, organ, organ system organism.If Cathryn's Great Grandmother, Grandmother and mom all live in different states and have a condition called Cerebral Ataxia. What can you conclude as to the reason why they have the condition?
It is an inherited trait that is passed down from generation to generation.
Put the following words in order from greatest to largest.
Nucleus, Gene, Cell, Chromosome
Cell, Nucleus, Chromosome, Gene
What happens when a recessive allele is paired up with a dominant allele?
It is hidden / doesn't show up
What is a genotype?
The genetic makeup of an organism.
This type of organism has 2 dominant alleles for a trait.
Homozygous dominant
Do the following cross (A = freckles, a = no freckles):
Aa x Aa
What are the possible genotypes?
Phenotypes?
AA, Aa, aa
75% Freckles
25% No Freckles
What is the advantage of sexual reproduction?
The offspring are more diverse and this can allow the species to survive environmental change.
A section of DNA is called
a gene
give 3 facts about sexual reproduction
ANSWERS CAN VARY
*2 parents * not genetically identical
*diverse offspring
* half of the chromosomes from mom and half come from dad
Do the following cross where B = blue eyes, b = brown eyes.
Bb x bb
Genotype?
Phenotype?
Bb, bb
50% Blue Eyes
50% Brown Eyes