Genetics Review Day

What's the inheritance pattern?

• Autosomal Dominant

• Autosomal Recessive

• X Linked Dominant

• Mitochondrial

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Most likely inheritance pattern?

• Mitochondrial Homoplasmic

• Mitochondrial Heteroplasmic

• Y linked

• X linked dominant

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Inheritance pattern? Most likely?

• X linked recessive

• Y linked

• Autosomal Dominant

• Autosomal Recessive

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Crossing a true breeding dragon with lavender scales and a dragon with rose scales yields all lavender F1 progeny. An F1 self cross of lavender dragons leads to a mix of dragon babies: 288 lavender, 97 sage, 96 saffron, and 32 rose. If you cross a true breeding sage and a true breeding saffron dragon, what phenotype(s) will you see in the progeny?

• Lavender and Rose

• Saffron

• All 4 phenotypes

• All Lavender

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

You’re a scientist studying fairies! You want to understand what genes control fairy wing color. Fairies with one allele for blue wings (B) and one allele for white wings (b) have blue wings.

After performing an F1 cross of the two blue winged fairies, you observe a 207:103 blue winged to white winged fairy ratio. 

What inheritance pattern satisfies this data?

• Recessive Lethal; Blue dominant

• Dominant Lethal; Blue dominant

• Recessive Lethal; white dominant

• Dominant Lethal; white dominant

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A true breeding long scale dragon mates with a short scale dragon, and they produce 12 baby dragons, all of which have rippled scales. After crossing two of the F1 offspring, the following dragons result:  12 of the babies have short scales, 13 have long scales, and 25 have rippled scales. How many genes control this pattern? What’s it called?

• incomplete dominance, 2 genes

• incomplete dominance, 1 gene

• recessive epistasis; 2 genes

• redundancy; 2 genes

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In Lothcats, the autosomal recessive ‘scratchy’ mutation displays interactions with the X linked recessive ‘long eared’ mutation. Lothcats that are simultaneously homozygous recessive for ‘scratchy’ and hemizygous/homozygous recessive for ‘long eared’ also have violet fur. If there are no mutations, the lothcat is wild type! What are the F1 phenotypes of a cross between a long eared female Lothcat and a ‘scratchy’ male Lothcat?  

• violet males and scratchy females

• violet males and wild type females.

• all wild type

• long eared males, scratchy females

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Pink 1 x Pink 2 --> 100% Purple --> 9:7 Purple to Pink

Pink 1 x Pink 3 --> 100% Purple --> 9:7 Purple to Pink

Pink 2 x Pink 3 --> 100% Pink --> 100% Pink

• assume true breeding mutants

How many genes? If two mutants have the same genotype, which two?

• 3 genes, all mutants are different

• 2 genes, 1 & 3 are the same

• 2 genes, 2 & 3 are the same

• 2 genes, 1 & 2 are the same

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Ratios: What inheritance type is it?

47:3

• monohybrid

• recessive lethal

• redundancy

• recessive epistasis

Tags

NGSS.HS-LS3-3

Ratios: What inheritance type is it?

26:9:13

• recessive epistasis

• dominant epistasis

• dominant lethal

• complementation