The study of heredity began with 1._____, who is known as the "Father of Genetics." He discovered that traits are inherited through factors we call 2._____, which are different forms of a gene. The genetic makeup of an organism, called its 3.______, determines its physical traits, or 4._____.

Question

When an organism has two identical alleles for a trait, it is described as 5._____. If it has two different alleles, it is 6.______. Some traits are controlled by 7._____ alleles, which overshadow 8._____ alleles in heterozygous individuals. Some traits show 9._____, such as a cow with both red and white hair appearing as patches, where both alleles are fully expressed. In contrast, 10____ results in a blend of traits, like a pink flower produced from a red and white flower cross.

a. Mendel
b. alleles
c. genotype
d. phenotype
e. homozygous
f. heterozygous
g. dominant
h. recessive
i. codominance
j. incomplete dominance

Answer 1

The study of heredity began with 1. Mendel, who is known as the "Father of Genetics." He discovered that traits are inherited through factors we call 2. alleles, which are different forms of a gene. The genetic makeup of an organism, called its 3. genotype, determines its physical traits, or 4. phenotype.

When an organism has two identical alleles for a trait, it is described as 5. homozygous. If it has two different alleles, it is 6. heterozygous. Some traits are controlled by 7. dominant alleles, which overshadow 8. recessive alleles in heterozygous individuals. Some traits show 9. codominance, such as a cow with both red and white hair appearing as patches, where both alleles are fully expressed. In contrast, 10. incomplete dominance results in a blend of traits, like a pink flower produced from a red and white flower cross.