1. Chapter 3 HEREDITY

2. The different forms of a gene that decide a characteristic are known as
alleles.
phenotype.
albinism.
pedigree.

3. Instructions for an inherited trait are called
alleles.
phenotype.
albinism.
genes.

4. What is a feature that has different forms in a population?
Pedigree
Characteristic
Fertilization
albinism

5. What is a trait? Different forms of meiosis Different forms of mitosis
Different forms of a pedigree
Different forms of a characteristic

6. What is heredity? Traits passing on from offspring to parent
Traits passing on from parents to offspring
Plants that are cross-pollinating
The ratio of dominant to recessive traits

7. The one thing that Gregor Mendel realized could explain the results of his experiment was that
the traits were appearing at random.
the male traits were always dominant ones.
each trait had two sets of instructions, one from each parent.
his important research would open the door to modern genetics.

8. What did Mendel discover about recessive traits?
Recessive traits reappear in the second generation.
Recessive traits disappear altogether.
Recessive traits never appear in the second generation.
Recessive traits become dominant.

9. What ration explained the grey flowers and white flowers in the second generation
1 to 1
2 to 1
3 to 1
4 to 1

10. Why are the first generation flowers always gray?
Gray is the dominant color.
Gray is the recessive color.
Gray is the darker color.
It is just a coincidence.

11. A plant with 2 dominant or 2 recessive alleles is said to be
heterozygous.
homozygous.
cross-pollinating.
true-breeding.

12. What kind of plant produces offspring with the same traits as the parent?
Co-dominance
Incomplete dominance
True-breeding
Non-breeding

13. What happens when a true-breeding plant self-pollinates?
One of its offspring has the same traits as the parent.
Some of its offspring have the same traits as the parent.
All of its offspring have the same traits as the parent.
None of its offspring have the same traits as the parent.

14. When a plant fertilizes itself, it is called a(n)
Incomplete dominance.
Co-dominance.
Self-pollinating plant.
Cross-pollinating plant.

15. What is a phenotype? The way an organism feels. A group of 2 alleles.
A dominant gene.
The way an organism looks/

16. Why do sex linked disorders occur more often in males?
Males have 2 X chromosomes
Males have only 1 X chromosome
Males have 2 Y chromosomes
Males have 1 X and 2 Y chromosomes

17. What is it called when cells are copied with half the number of chromosomes?
DNA
Meiosis
A nucleus
Mitosis

18. How are sex cells different than other human cells?
Sex cells have more chromosomes
Sex cells have half as many chromosomes
Sex cells are larger
Sex cells have no chromosomes

19. Each parent gives one set of these to the offspring.
Genes
Genotypess
Phenotypes
Meiosis

20. This diagram is used to trace a trait through generation of a family.
Pedigree chart
Punnett square
Meiosis box
Generation square

21. If (B) is dominant, and a brown rate mates with a white rat and 50% of their offspring are white, what are the genotypes of the two parent rats?
BB, bb
Bb, bb
BB, Bb
Bb, Bb

22. A brown rat and a white rat mate and produce all brown rats
A brown rat and a white rat mate and produce all brown rats. This is an example of
Co-dominance
Dominance
Incomplete dominance
recessiveness

23. A brown rat and a white rat mate and produce brown rats with white spots. This is an example of
Co-dominance
Dominance
Incomplete dominance
recessiveness

24. A brown rat and a white rat mate and produce a tan colored rat
A brown rat and a white rat mate and produce a tan colored rat. This is an example of
Co-dominance
Dominance
Incomplete dominance
recessiveness

25. Be able to identify 2 ways that plants can cross pollinate.
Know how to fill in a Punnett Square and answer questions about % of traits of offspring, and what the genotypes and phenotypes of offspring will be

26. Explanation of genotypes & phenotypes:
For rabbits, the allele for black fur, B, is dominant over the
allele for white fur, b.
Suppose two black bunny parents have three black bunnies and one white bunny.
Using a Punnett square show and then explain the genotypes of the parents and the possible genotypes of all four offspring. Explain what percentage will be black and white.
Explanation of genotypes & phenotypes:
Parents: Genotype = Phenotype
_____ = ______________
_____= _______________
Offspring: Genotype = Phenotype Ratio
______ = _______________ ____%