PASS W8 Content

Different variations of a gene are called?

• Alleles
• DNA
• Chromosome
• Gene

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2

The physical expression of a trait is called the ...

• genotype

• phenotype

• homozygous

• heterozygous

Tags

NGSS.HS-LS3-3

What does Mendel’s law of segregation state?

• Each gene exists in only one copy.

• Alleles segregate equally into gametes during meiosis.

• Genes on different chromosomes are inherited together.

• Dominant alleles are always passed to offspring.

During which phase of meiosis does Mendel’s law of segregation occur?

• Prophase I

• Metaphase I

• Anaphase I

• Telophase II

Which of the following best explains Mendel’s principle of independent assortment?

• Alleles of the same gene segregate together.

• Each pair of alleles segregates independently of alleles of other genes.

• Dominant alleles suppress the assortment of recessive alleles.

• Genes on the same chromosome always assort independently.

What meiotic mechanism explains independent assortment?

• Random alignment of homologous chromosomes in metaphase I.

• Crossing over between sister chromatids.

• Duplication of centromeres.

• Non-disjunction events.

What genetic result explains the 9:3:3:1 ratio in dihybrid crosses?

• Linked genes

• Independent assortment

• Co-dominance

• Incomplete dominance

Which is an example of incomplete dominance?

• Red × white flower → pink offspring

• AB blood type

• Brown-eyed × blue-eyed → brown-eyed offspring

• Yellow × green peas → yellow offspring

How do you recognize an autosomal dominant trait in a pedigree?

• Skips generations

• Affects only males

• Appears in every generation

• Appears only when both parents are carriers

Which pattern best describes an autosomal recessive pedigree?

• More males affected

• Equal in males and females, skips generations

• Trait only in males

• Trait appears in every generation