An organism that has the same genes for a trait (ex. TT or tt)
the passing of traits from parent to offspring
2. Multiple Choice
1 minute
1 pt
What does heterozygous mean?
An organism that has the same genes for a trait (TT or tt)
An organism that has different genes for a trait (Tt)
When neither gene is fully dominant; offspring is a mixture of both
the different forms of a trait (hair color--> brown, blonde, red
3. Multiple Choice
1 minute
1 pt
An allele whose trait only shows up when no dominant allele is present.
hidden allele
dominant allele
recessive allele
present allele
4. Multiple Choice
30 seconds
1 pt
Two heterozygous (Tt)tall pea plants are crossed. Which describes their offspring?
50% tall and 50% short
75%tall and 25% short
100%short
5. Multiple Choice
1.5 minutes
1 pt
R=round seed r=wrinkled seed. Cross a homozygous round with a wrinkled. Which statement predicts the results?
offspring will be Rr
offspring will be RR
round seeds will be recessive to wrinkled
Wrinkled will be observed in half of offspring
6. Multiple Choice
30 seconds
1 pt
W=white hair w= non-white hair If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
none
3/4
1/2
all
7. Multiple Choice
1 minute
1 pt
Pea plants can have green or yellow seeds. In a pea plant that is heterozygous for seed color, the allele for yellow seeds masks the effects of the allele of green seeds. Which of the following terms best describes the allele for yellow seeds?
codominant
recessive
dominant
sex-linked
8. Multiple Choice
1 minute
1 pt
A human usually has _____ total chromosomes.
6
22
4
46
9. Multiple Choice
20 seconds
1 pt
Which of the following alleles is homozygous recessive?
Tt
tt
TT
T
10. Multiple Choice
30 seconds
1 pt
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?