DNA
True
What do genes decide?
What physical traits you will have
What do Punnett Squares help predict?
What traits the baby might have
How many chromosomes do we have?
46
What is the cell part that acts like the brain, controlling everything the cell does?
Nucleus
What is the shape of DNA strands?
Double Helix
What is the term for having two identical alleles
Homozygous
If the offspring's genotype is Tt for being tall, then it is...
Heterozygous
What do they carry?
DNA / Genetic information
What is the smallest part of your body?
Cells
What does DNA stand for?
Deoxyribose Nucleic Acid
What is an allele?
2 different versions of a gene. 1 of each
If two parents with blue eyes (recessive) have a baby, what color eyes will the baby have?
Blue
Which condition is caused by having an extra copy of chromosome 21?
Down Syndrome
What do you inherit from both your parents that decides your traits?
Genes
What part of the cell contains the DNA?
Nucleus
The observable trait on a person is what allele?
Dominant
Who discovered dominant and recessive genes/alleles?
Gregor Mendel
How many pairs of chromosomes do humans have?
23 pairs
If two parents can both roll their tongues, but their child can’t — what does that tell you about the tongue-rolling trait?
That tongue rolling is the dominant trait and that they are both heterozygous
Name 2 of the 4 chemical bases that make up the rungs of the ladder of DNA
Thymine, Guanine, Cytosine, Adenine
The Dominant Trait is Brown eyes and the recessive trait is blue eyes. How would it be possible for the offspring to have blue eyes as their observable trait?
Both parents pass down their recessive trait
Barbs mixed a dominant homozygous plant with a recessive homozygous plant. What genotype would the offspring all have, represented with the letter f.
Ff
What is the name of a change or mistake in chromosomes?
mutation
Which base always pairs with adenine in DNA?
Thymine