Heredity (lesson 1)
Who do you get your inherited traits?
Your parents
Humans have how many chromosomes found in each cell?
23 pairs
What are the four base pairs?
Adenine, Thymine, Guanine, Cytosine (ATCG)
What are dominant traits represented by?
Capital Letters
Which of the following is a genotype?
Aa
Freckles
What else affects how you will grow and develop?
Nutrition and environment
Which base pairs with Thymine (T) ?
Adenine (A)
What are punnett squares used to find?
Probabilities of offsprings genotypes
Which of the following is a homozygous pair of alleles?
BB
Bb
A double helix appears to look like what?
Twisted ladder or staircase
If a strand of DNA has 23% Thymine, what will the other percents be for the bases?
T:23, A: 23, C: 27, G: 27
If one parent has a genotype of Gg, and green is dominant and purple is recessive, what is their phenotype?
Green hair
Instructions for an inherited trait are called what?
Genes
What is the order from smallest to largest? 1. DNA, 2. chromosome, 3. base pair
3, 1, 2
Write the complementary DNA base pairs for the following DNA strand
T A C A G C T
A T G T C G A
If a parent has a phenotype of bumpy skin—which is a dominant trait (B)—what is their genotype?
BB or Bb
What is the appearance of a characteristic called?
Trait or Phenotype
How are DNA and chromosomes connected?
What do the dashed lines between the nitrogenous bases represent?
Hydrogen bonds
What is the probability (percent) that the offspring will have a brown hair (B) vs. black hair (b)?
Mom: bb Dad: Bb
50%