Across
- 2. expressed, or phenotypic, traits are attributable to genotypic variation in a person's DNA sequence
- 4. expressed, or phenotypic, traits are attributable to genotypic variation in a person's DNA sequence.
- 6. the other hand, a recessive allele will be expressed only if there are two identical copies of that allele, or for a male, if one copy is present on the X chromosome.
- 7. allele/an allele that produces its characteristic phenotype only when its paired allele is identical
Down
- 1. also plays an important role in genomic imprinting, which occurs when both maternal and paternal alleles are present but only one allele is expressed while the other remains inactive.
- 3. specialized condensed region of each chromosome that appears during mitosis where the chromatids are held together to form an X shape
- 5. allele/an allele that produces the same phenotype whether its paired allele is identical or different
- 8. DNA/Another class of non- coding DNA is the "pseudogene", so named because it is believed to be a remnant of a real gene that has suffered mutations and is no longer functional.