Intro. to Genetics

What is a zygote?

• a sex cell (egg or sperm)

• a fertilized egg (egg + sperm)

• one dominant allele and one recessive allele

• has one set (copy) of chromosomes

What is a gamete?

• A sex cell (egg or sperm)

• A fertilized egg (egg + sperm)

• One dominant allele and one recessive allele

• Has one set (copy) of chromosomes

Tags

NGSS.HS-LS3-1

If neither trait is dominant over the other and both traits are fully expressed in the offspring (NOT blended), what kind of dominance is that?

• Incomplete dominance

• Simple dominance

• Codominance

• Polygenic

What is a phenotype?

• The physical trait being expressed

• The combination of alleles in an individual

What is a genotype?

• The physical traits being expressed

• The combination of alleles in an individual

Tags

NGSS.HS-LS3-2

What is a gene?

• a portion of DNA that codes for a certain trait

• a sex cell

• a whole strand of DNA

• one version of a gene

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is an allele?

• A portion of DNA that codes for a certain trait

• A sex cell

• A whole strand of DNA

• One version of a gene

Which pair of alleles show the same phenotype?

• YY and yy

• Yy and YY

• Yy and yy

What causes an arctic fox's fur to change color from winter to summer?

• blood type

• Codominance

• incomplete dominance

• environmental influence

What is it called when allele pairs separate during gamete formation?

• Law of Segregation

• Law of Independent Assortment

Tags

NGSS.HS-LS3-2