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Allele For Real
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Geno, Pheno, Teno,... What?
Did You do Your Homework?
100
What is an allele?
A pair of genes that code for the same trait.
100
What is the definition for a dominant trait?
Determines what the offspring will look like.
100
What is the definition for a recessive trait?
A trait that shows up less often in offspring.
100
Give an example of a genotype? Describe if it is homozygous or heterozygous?
Answers vary Ex: RR (Homozygous), Rr (Heterozygous), or rr (Homozygous)
100
Did Mendel recognize that chromosomes were the things passed down from parents to offspring?
No he called them particles at the time.
200
Give two example of an allele
Answers vary Ex: Eye Color - BB = Brown Eyes (Dominant) Bb = Brown Eyes bb = Blue Eyes (Recessive)
200
What is the dominant allele in this example? B or b
B
200
Which of these alleles is homozygous recessive? JJ Jj jj Why?
jj because we symbolize recessive traits with small letters.
200
Give an example of a phenotype?
Answers vary. Ex: Red, white, or purple flowers
200
What is the probability of flipping two coins and landing both on tails? Why?
1/4 or 25% because there are four sides to the coin and each coin has a probability of 1/2 to each side.
300
What would the dominant trait be in the following example for dimples? Bb (No Dimples) or bb (Dimples) Why?
Bb The large letter always symbolizes the dominant trait regardless of the other letter.
300
What is the name for the following alleles? HH
Homozygous Dominant
300
Given the following two traits, which are recessive and which are dominant: Hazel Eyes (Bb) Blue Eyes (bb) Right Hand (Ll) Left Hand (ll) Dimples (dd)
Hazel Eyes (Bb) - Dominant Blue Eyes (bb) - Recessive Right Hand (Ll) - Dominant Left Hand (ll) - Recessive Dimples (dd) - Recessive
300
Given the following: RR - Green Tail lizard Rr - Green Tail lizard rr - Yellow Tail lizard What is the homozygous recessive phenotype?
Yellow Tail lizard
300
What is the probability of shooting a 4 with one dice? Why?
1/6 because there are six sides and only 1 side has a four.
400
How many alleles come from our mothers?
1 (The other comes from our fathers)
400
If a male black lab (bb) mated with a female black lab (bb), would you get any yellow labs (Bb)?
No because both parents were homozygous recessive (bb) and the B allele was never present in the parents.
400
If a male brown cow (Bb) mated with a female white cow (bb), would any white cows (bb) be born?
Yes
400
Given the following: BB - Large Mane Lion Bb - Large Mane Lion bb - Small Mane Lion What is the heterozygous genotype?
Bb
400
Where did Mendel do his research and on which organisms?
He did his research in the Czech Republic and it was on pea plants.
500
Double Jeopardy Name this type of allele with the terms we learned today: Bb
Heterozygous
500
Which letter symbolizes a homozygous dominant trait for people who are tall?
Any letter can be used.
500
Can there be a heterozygous recessive trait for eye color? Why or why not?
No because a recessive trait can only have alleles with small letters (ll, bb, gg, etc.) and a heterozygous trait has one big letter and one small letter (Ll, Bb, Gg, etc.).
500
Double Jeopardy If a male short winged fruit fly (BB) mated with a female long winged fruit fly (bb), what is the genotype of the male short winged fruit fly?
BB
500
What is the probability of shooting only evens on one dice? Why?
1/2 because there are 6 sides and there are 3 even numbers (2, 4, and 6). The probability would be 3/6 which is also equal to 1/2.