Genetics Practice Questions

If a sexually reproducing organism has 48 chromosomes in its body cells, how many chromosomes did it inherit from each parent?

• 28

• 32

• 24

• 12

Which of the following is NOT a phenotype?

• long legs

• pointed ears

• short fur

• chromosomes

Select all of the following genotypes that is/are a heterozygous genotype?

• DD

• Dd

• dd

• Pp

Which statement correctly describes a difference between asexual and sexual reproduction?

• Sexual reproduction  only happens in animals, while asexual reproduction only happens in plants.

• Sexual reproduction only happens in prokaryotes, while asexual reproduction only happens in eukaryotes.

• Sexual reproduction requires fertilization of one gamete by another gamete, while asexual reproduction requires only one parent to produce an offspring.

• Sexual reproduction only occurs in cells without a nucleus, while asexual reproduction occurs in cells with a nucleus.

Tags

NGSS.MS-LS3-2

What are the advantages of sexual reproduction? Choose all that apply.

• fast and efficient reproduction

• offspring genes are identical to parent

• offspring genes vary from parent

• can better adapt to environment and disease

• beneficial mutations may occur

Tags

NGSS.MS-LS3-2

NGSS.MS-LS4-4

Two tall pea plants are crossed and their seeds are planted in a sunny spot in the garden.  They received the same amount of water, are exposed to the same temperatures and soil conditions.  At the end of  the growing season you notice that 75% of the plants are tall and 25% of the plants are short.  Which of the following best explains these results?

• The temperatures outside varied over the growing season which caused some plants to not grow as tall.

• The amount of sunlight the plants received was different, thus some did not get enough light to grow tall.

• The growing conditions of the plants were different, thus some did not get the resources they needed like fertilizer.

• The plants received different genetic factors from the parents, some received the tall factor and some the short factor.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS4-4

Match the Each statement with either supports asexual reproduction or sexual reproduction. Move the statement to the appropriate category. 

• sexual

• Unicellular reproduction

• asexual

• Meiosis

• sexual

• Offspring is identical

• asexual

• Mitosis

• asexual

• Two parents

Tags

NGSS.MS-LS3-2

Which Punnett square shows a cross between a heterozygous tall (Tt) plant and a homozygous short (tt) pea plant?

• D

• C

• B

• A

Use the Punnett square below to answer the question below.

Possible offspring of two people who are heterozygous for earlobe attachment are shown. What is the probability of having a child who has attached earlobes?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-3

An organism’s physical appearance is called

• genotype

• heterozygous

• phenotype

• homozygous

Tags

NGSS.MS-LS4-2