Mendelian Genetics

From the following which is an example of a heterozygous allele.

• RW

• Rw

• rr

• RRWW

Which of the following cross will give a 1:2:1 genotypic ratio?

• AA X aa

• AA X AA

• Aa X Aa

• AA X Aa

If a cross between two mice produce 10 black mice and 3 white mice. Which skin color is dominant?

• White

• Black

• Both

• None

Black fur is dominant to white fur. Cross two heterozygous black mice. What is the phenotypic ratio of the offspring?

• 2:2

• 3:1

• 4:0

• 1:2:1

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

If 2 heterozygous individuals are crossed, What percent of their offspring will also be heterozygous?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-3

The scientific stud of heredity is known as

• Allelics

• Genomics

• Genetics

• Obstetrics

A homozygous organism is best described as which of the following?

• Hybrid

• Dominant

• Purebred or True-breeding

• Recessive

The term associated with showing the physical traits is known as

• Allele

• Phenotype

• Genotype

• All of the above

A purebred tall person is crossed with a purebred short person and all of their offspring are tall. What is the most likely genotype of the offspring?

• Tt

• TT and tt

• TT

• tt

In tigers a recessive gene causes as absence of fur pigmentation and a cross eyed condition. If two phenotypically normal tigers, that are heterozygous for this loci mate, What percentage of their offspring will be cross eyed and white?

• 100

• 50

• 25

• 0