Genetics, Punnett Squares, & Pedigree Charts... Oh my!

How is it possible for an offspring show a trait that is not displayed in either of its parents?

• When both parents are homozygous recessive and showing the recessive trait, their offspring will get the dominant gene. This will allow the offspring to show the dominant trait.

• The genes have been modified from parent to offspring

• When both parents are heterozygous and showing the dominant trait, it is possible for both parents to pass on the recessive gene to their offspring. This will allow the offspring to show the recessive trait.

A section of the DNA strand that determines a specific trait

• gene

• trait

• chromosome

• allele

A type of gene that can be hidden is called

• genotype

• recessive

• dominant

• allele

----is the type of gene that always shows itself when present

• genotype
• homozygous
• phenotype
• dominant

---- Is the combination of two alleles that are the same

• genotype
• homozygous
• phenotype
• trait

The letters that make-up the genetic code for a trait

• genotype
• heterzygous
• phenotype
• trait

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

Which of the following genotypes is homozygous dominant?

• A
• Aa
• AA
• aa

Which of the following genotypes is heterozygous?

• Bb
• BB
• bb
• B

Tags

NGSS.HS-LS3-1

Which of the following is homozygous dominant?

• Yy
• Y
• yy
• YY

Which of the following is a phenotype?

• Aa
• red hair
• heterozygous
• DNA

Tags

NGSS.HS-LS3-2