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- 1. Multiple Choice
Before Mendel how did people think you got your traits
equal blending from each parent
more from the dad
more from the mom
from a stork
- 2. Multiple Choice
If you cross two heterozygous traits (Rr x Rr), what ratio will you get between offspring with the dominant and recessive phenotypes
1:1
2:1
3:1
4:1
- 3. Multiple ChoiceMendel concluded that traits arenot inherited by offspringinherited by the passing of factors from parents to offspringdetermined by dominant factors onlydetermined by recessive factors only
- 4. Multiple ChoiceWhen Mendel crossed true-breeding tall plants with true-breeding short plants, all the offspring were tall becausethe allele for tall plants is recessive.the allele for short plants is dominant.the allele for tall plants is dominant.they were true-breeding like their parents.
- 5. Multiple ChoiceIn the P generation, a tall plant was crossed with a short plant. Short plants reappeared in the F2 generation becausesome of the F2 plants produced gametes that carried the allele for shortness.the allele for shortness is dominantthe allele for shortness and the allele for tallness segregated when the F1 plants produced gametes.they inherited an allele for shortness from one parent and an allele for tallness from the other parent.
- 6. Multiple ChoiceA Punnett square shows all of the following EXCEPTall possible results of a genetic cross.the genotypes of the offspring.the alleles in the gametes of each parent.the actual results of a genetic cross.
- 7. Multiple ChoiceA pea plant that has two different alleles for the same trait is said to be ____________________.PheterozygousTtF2
- 8. Multiple ChoiceAn organism’s gametes have ____________________ the number of chromosomes found in the organism’s body cells.half23twice4
- 9. Multiple ChoiceHow many recessive alleles for a trait must an organism inherit in order to show that trait?2140
- 10. Multiple Choice
What pattern of inheritance is shown in this image?CodominanceIncomplete dominancePolygenic traits - 11. Multiple Choice
What is the genotype of a person with type A blood, who had a father with type O blood?
IAIB
IAi
IAIA
ii
- 12. Multiple Choice
A roan cow shows co-dominance in fur color (red and white). What is the phenotype ratio expected if a roan cow and a roan steer mate together?
4/4 Red and White
2/4 Red, 2/4 White
2/4 Red, 2/4 Roan, 0/4 White
1/4 Red, 2/4 Roan, 1/4 White
- 13. Multiple ChoiceDoes this pedigree show a dominant or recessive trait?DominantRecessive
- 14. Multiple Choice
XB = Normal vision allele
Xb = color blind allele
Complete a Punnett square showing the cross of a heterozygous (carrier) female and a colorblind male. Which percentage of children would be predicted to be colorblind?
25%
50%
0%
100%
- 15. Multiple Choice
Hemophilia (X-linked)
XH = Normal clotting
Xh = hemophilia
Explain how you know the genotype of the father if a woman has hemophilia.
If a woman is hemophilic, she has two recessive alleles on her X chromosomes. Since her father only has one to give, he must have the recessive allele and therefore be hemophilic (he only has one X chromosome).
If a woman is hemophilic, she has two recessive alleles on her X chromosomes. Since her father only has one to give, he must have the dominant allele and therefore be hemophilic.
If a woman is hemophilic, she has one recessive allele on her X chromosomes. Since her father only has one to give, he must have the recessive allele and therefore be hemophilic (he has two X chromosomes).
- 16. Multiple Choice
A man with PKU marries a woman without any alleles for PKU. What is the probability that their child will inherit PKU?
0%
25%
50%
75%
- 17. Match
Match the following. H= no hemophilia, h = hemophilia
XHY
Male without hemophilia
XhY
Female with hemophilia
XhXh
Female Carrier
XHXH
Male with hemophilia
XH Xh
Female who is NOT a carrier
- 18. Multiple ChoiceWhich of the following genotypes belongs in the red box in the Punnett square?
XBXb
XbXb
XbY
XBY
- 19. Multiple Choice
The following punnett square depicts the x-linked cross of a female who carries hemophilia with a man showing no symptoms. Fill in the genootype represented by the blank box in the punnett square.
XH XH
Xh XH
XH Y
Xh Y
- 20. Match
Match the following
The genetic makeup or set of alleles of an organism
Homozygous
The physical traits of an organism determined by genetic makeup
Heterozygous
Having two different alleles for a given gene
Phenotype
Having two identical alleles for a given gene
Genotype
Alternative form of a gene
Allele
- 21. Multiple Choice
If this pedigree shows a recessive disorder, what MUST the genotype of individual 4 be?
HH
Hh
hh
- 22. Multiple ChoiceIs this trait (the shaded individuals) dominant or recessive?dominantrecessive
- 23. Multiple ChoiceGive the genotype for person II-1, for this autosomal trait.GGGgggwe cannot be 100% sure of the genotype
- 24. Multiple Choice
Individuals that are shaded in have premature hair whitening. Is this trait dominant or recessive? How do you know?
Dominant because it skips generations
Dominant because it is present in every generation
Recessive because it skips generations
Recessive because it is present in every generation.
- 25. Multiple Choice
A segment of DNA that codes for a trait
gene
centromere
chromosome
chromatid
- 26. Multiple Choice
A version or variation of a gene
trait
gene
allele
DNA
- 27. Multiple Choice
The alleles that an organism has/inherits are its
genotype
phenotype
chromosome
recessive
- Answer choicesTagsAnswer choicesTags