Question

which of the following represents a dominant allele?
a. letter with a exclamation point
b. lowercase letter
c. uppercase letter
d. letter that is always hidden by the recessive allele

why do sex - linked traits differ between males and females?
a. males have two copies of the x chromosome.
b. both males and females equally inherit sex - linked traits.
c. females have two x chromosomes, while males have one x and one y chromosome.
d. females have one x and one y chromosome.

what is the primary focus of genetics as a field of study?
a. the study of animal behavior
b. the study of human anatomy
c. the study of heredity and variation
d. the study of ecosystems

Explanation:

1. In genetics, dominant alleles are typically represented by uppercase letters. Recessive alleles are represented by lowercase letters.
2. Males have one X and one Y chromosome (XY), while females have two X chromosomes (XX). This difference in chromosome composition leads to differences in sex - linked traits.
3. Genetics is the scientific study of heredity and variation in living organisms.

Answer:

1. C. Uppercase letter
2. C. Females have two X chromosomes, while males have one X and one Y chromosome.
3. C. The study of heredity and variation