_____1. What do you call the organisms expressed physical appearance such as hair color or shape?
A. Allele C.Genotype
B. Gametes D. Phenotype _____2. What do you call the passing of traits from parent to offspring?
A. Alleles C. Genetics
B. Genes D. Heredity
_____3. Which combination of sex chromosomes results in a male human being?
A. XX C. XY
B. YY D. either XX or YY _____4. Which of the following genotypes represents with a symbol of “aa “?
A. dominant
B. heterozygous
C. homozygous recessive
D. homozygous dominant
_____5. Which non Mendelian genetics is example of ABO blood types?
A. Codominance C. Multiple alleles B. Dominance D. Sex related dominance
_____6. A pink four o’clock flower (RW) is pollinated by a male white flower (WW). What percentage of their offspring will have a white colored petal?
A. 25% C. 75%
B. 50% D. 100%
_____7. Hemophilia (h) a recessive disorder is an example of sex-linked trait. Which of the following genotype represents a female with hemophilia?
A. Xh Xh C. XH XH
B. XH Xh D. Xh Y
_____8. The egg cell is fertilized by the sperm which carries X-chromosome. What will be the gender of the fertilized egg cell?
A. Male C. Hermaphrodite
B. Female D. None of the above _____9. How many pairs of chromosomes does human have? A.12 B.23
C. 46 D.55
_____10. Which of the following is not a component of DNA molecule?
A. Nitrogen bases C. Phosphate
B. Sugar D. Protein​