Biology EOC Sec 1 Practice Test

The gure below shows a Punnett Square for an

inherited trait.

The arrow is pointing to a circled genotype in

the square. What genotype does the circled ìddî

represent?

• the genotype in the mother's egg

• the genotype that only the girls will inherit

• the genotype that any of the children could

  inherit

• the genotype that exactly 1/4 of the children will inherit

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

Fruit flies have 3 chromosomes plus sex

chromosomes (X and Y). Mutations occurred

within four different cells of an individual female

fruit fly as shown in the table below. Which of these mutations could be passed on to

this fruit fly's offspring?

• absent eyes

• curly wings

• yellow body

• leg-shaped antennae

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NGSS.MS-LS3-1

NGSS.MS-LS3-2

The diagram below represents a cross between two

pea plants. In pea plants, the allele for round seeds (R) is

dominant to the allele for oval seeds (r). In a cross

between the two plants above, what percentage of

the offspring will have round seeds?

• 100%

• 75%

• 50%

• 25%

Which of the following best describes the

inheritance of a sex-linked trait?

• a recessive allele carried by females that

  affects only males

• a dominant allele carried by females that

  affects only males

• an allele carried on the Y chromosome that

  can affect both males and females

• an allele carried on an X chromosome that

  can affect males or females

Tags

NGSS.HS-LS3-1

If a corn plant has a genotype of Ttyy, what are

the possible genetic combinations that could be

present in a single grain of pollen from this plant?

• Ty, ty

• TY, ty

• TY, Ty, ty

• Ty, ty, tY, TY

In certain breeds of dogs, deafness is due to

a recessive allele (d) of a particular gene, and

normal hearing is due to its dominant allele (D).

What percentage of the o spring of a normal

heterozygous (Dd) dog and a deaf dog (dd) would

be expected to have normal hearing?

• 0%

• 25%

• 50%

• 100%

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NGSS.HS-LS3-1

Which sequence of DNA bases would pair with

the ones shown in the partial strand below?

• 
• 
• 
• 

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NGSS.HS-LS1-1

The diagram below shows Rosalind Franklin's

x-ray diffraction image of DNA. How did this evidence affect the work of Watson

and Crick?

• It was used to determine the physical structure

  of DNA.

• It was used to identify the four bases that

  make up DNA.

• It was used to develop the theory of

  independent assortment.

• It was used to show that DNA was the

  molecule of inheritance.

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NGSS.HS-LS1-1

5' ATCAGCGCTGGC 3'

The above sequence of DNA is part of a gene.

How many amino acids are coded for by this

segment?

• 4

• 8

• 12

• 20

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NGSS.HS-LS1-1

What is a primary role of decomposers in an

ecosystem?

• They eliminate matter by taking nitrogen from

  the ecosystem.

• They eliminate matter by taking phosphorus

  from the ecosystem.

• They cycle matter by returning carbon and

  other matter to the ecosystem.

• They cycle matter by returning oxygen and

  other matter to the ecosystem.

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NGSS.MS-LS2-3