1. Gametes are produced by the process of meiosis.

2. A breed of chicken shows incomplete dominance for feather color. One allele codes for black feathers, another codes for white feathers. The feathers of heterozygous chickens of this breed will be Gray.

3. In rabbits, there are four different versions of the gene for coat color. What pattern of inheritance is this? multiple alleles.

4. When Gregor Mendel crossed a tall plant with a short plant, the F1 plants inherited ___ allele from each parent. one

5. If an organism’s diploid number is 46, its haploid number is 23

6. What are the only kinds of cells that undergo meiosis? sex cells, gametes

7. This diagram shows incomplete dominance

8. When you flip a coin, what is the probability that it will come up tails? 50%

9. What is the probability that a cross between parents who are both homozygous recessive for trait will have offspring that are homozygous recessive for that trait? 100%

10. Variation in human skin color is an example of polygenic traits.

11. Organisms that have two different alleles for a particular trait are said to be heterozygous.

12. Which of the following supports the claim that the environment can affect genetic traits? a. Pinion trees bear cones every other year. b. Dandelion plants are self pollinating. c. Oak trees get taller as they grow. d. Hydrangea flower color varies with soil pH. Hydrangea flower color varies with soil pH.

13. Unlike mitosis, _________results in the formation of haploid cells. meiosis

14. A breed of chicken shows codominance for feather color. One allele codes for black feathers, another codes for white feathers. The feathers of heterozygous chickens of this breed will be speckled.

15. Chromosomes form tetrads during __________ of meiosis. prophase I

16. If two genes are on the same chromosome and rarely assort independently, the genes are probably located _____ close to each other. Or far apart from each other close to each other.

17. The different forms of a gene are called alleles.

18. What principle states that during gamete formation genes for different traits separate without influencing each other’s inheritance? principle of independent assortment

19. A male and female bison that are both heterozygous for normal skin pigmentation (Aa) produce an albino offspring (aa). Which of Mendel’s principles explain(s) why the offspring is albino? dominance and segregation

20. A tall plant (TT) is crossed with a short plant (tt). If the tall F1 pea plants are allowed to self-pollinate, the offspring can be tall or short.

21. True or False The farther apart two genes are located on a chromosome, the less likely they are to be inherited together. True

22. True or False One way that meiosis I is different from mitosis is that meiosis I produces 2 haploid daughter cells, but mitosis produces 2 diploid daughter cells. True

23. A _________ consists of a homologous pair of chromosomes, each made of two chromatids. tetrad

24. four genetically different cells are is formed at the end of __________ meiosis

25. A heterozygous tall pea plant is crossed with a short plant. The probability that an F1 plant will be tall is 50%.

26. True or False Gregor Mendel’s principles of genetics apply to pea plants only. (False) all organisms

27. The number of chromosomes in a gamete is represented by the symbol N

28. Situations in which one allele for a gene is not completely dominant over another allele for that gene are called incomplete dominance.

29. Mitosis results in two cells, whereas meiosis results in _____ cell. four

30. Organisms that have two identical alleles for a particular trait are said to be homozygous.

31. The probability that a gamete produced by a pea plant heterozygous for stem height (Tt) will contain the recessive allele is _____% 50%

32. Roan cattle show codominance for the color of their hair. There are alleles for red hair and white hair. What would you expect a heterozygous roan bull to look like if the trait showed incomplete dominance instead? It would be pink.

33. An organism has 24 chromosomes in a body cell. After mitosis each cell has 24 chromosomes. After meiosis each gamete has ____________________ chromosomes. 12

34. What is being shown Crossing-over