8^th Grade Science Heredity Name:

Matching:

A. Watson and Crick B. Gregor Mendel C. Allele

D. Law of Segregation E. Law of Independent Assortment F. Pistil

G. Hybrid H. Phloem I. Xylem

J. Stigma K. Mutation L. Chromosome

1. ___ Plant tissue conducting water, also known as wood.

2. ___ Individual with heterozygous alleles.

3. ___ Says a gamete contains only one allele from the parental pair.

4. ___ A change in the DNA that may change an organism or cause cancer.

5. ___ Stated the basic laws of heredity after studying pea plants.

6. ___ One of the different forms of a gene responsible for alternate traits.

7. ___ All the female parts of a flower.

8. ___ Huge strands of DNA containing multiple genes in a cell.

9. ___ Says different alleles go into gametes randomly; traits not linked.

10. ___ Tissue which conducts food materials in a plant.

11. ___ Female flower part where pollen lands.

12. ___ Identified DNA and chromosomes as responsible for heredity.

13. An allele that can be suppressed when paired with another allele is:

(a) dominant (b) recessive (c) codominant

14. If both copies of an allele are the same in an individual, they are:

(a) homozygous (b) heterozygous (c) hybrids

15. An eggplant develops from a bright purple flower. It is a: (a) fruit (b) vegetable

16. Vegetative mold cells are: (a) haploid (b) diploid (c) photosynthetic

17. Fill in the blanks to create a perfectly-matching strand of DNA to the one already there. Use A for Adenine, T for Thymine, G for Guanine, and C for Cytosine.

- G – A – C – G – A – T – T – A -

| | | | | | | |

- C -___-___-___-___-___-___- T –

18. Two parents are expecting their first baby. One parent is blood type AB, the other type O. Work out the Punnett Square below to see what are the possible genotypes of the baby. (Parental alleles are already in place for you.) Then tell what are its possible blood types and percentage chance for each one.

	O	O
A
B

19. A pink snapdragon (RW) is crossed with a red snapdragon (RR). Fill in the Punnett Square and determine what color(s) the offspring will be.

RR = red WW = white RW = pink

	R	W
R
R

The colors of the offspring :

20. Inheritance patterns as above show alleles that are:

(a) dominant (b) recessive (c) codominant

21. Two individuals are both carriers of a recessive genetic condition. Normally, each of their offspring has what chance of being homozygous for this recessive condition?

(a) ¼ (b) ½ (c) 100%

22. Guanine is always paired with: (a) Adenine (b) Cytosine (c) Thymine

23. List the FOUR stages of mitosis: 1.

2.

3.

4.

24. In pea seed color, the Y allele is for yellow and is dominant. The y allele is for green color and is recessive. What will be the phenotype (apparent color) of a Yy heterozygous individual?

(a) yellow (b) green (c) white (d) blue

25. A homozygous short pea plant (tt, t is recessive) is crossed with a homozygous tall pea plant (TT, T is dominant). Fill in the Punnett Square below to determine the genotype and phenotype of the offspring.

	T	T
t
t

Essay: Write a short paragraph explaining why all offspring shown above are identical. When will the recessive trait reappear?