Genes and Heredity Test Review

Crossbred dogs are hybrids and have a combination of traits from both parents'.

What genotype would the offspring have if two labradoodles were bred together

• homozygous

• purebred

• heterozygous

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What did Mendel discover about the principles of heredity. Choose two statements.

• Individuals get one factor for a trait from each parent.

• Genetic material is genes on DNA.

• A dominant factor can hide the expression of a recessive factor when both are present.

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which of these terms describes the physical trait of an organism's genes?

• genotype

• inherited factor

• phenotype

• masked trait

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If you cross one short-winged fly (ww) with a wild-type fly (WW), what is the probability of getting a short-winged offspring in the F1 generation?

• 100%

• 75%

• 50%

• 25%

• 0%

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS4-3

How many chromosomes are in the sex cells of organisms?

• always 23

• always half as many as in the body cells

• always as many as the body cells

• always twice as many as in the body cells

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NGSS.HS-LS3-2

What is a person missing when there is an incomplete chromosome?

• many genes

• all genes

• a body cell

• a sex cell

Which of the following occurs during mitosis.

• A plant produces pollen cells with half the chromosomes of the parent cells.

• A bacterium divides to make two identical daughter cells.

• A skin cell divides rapidly to replace tissue damaged by a scrape.

• A cell duplicates its genetic material once and then divides twice to make 4 daughter cells.

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In DNA replication, what is the next step after the DNA has unzipped?

• Ribosomes attach to DNA and move along the strand.

• Nitrogen bases pair up with the DNA strand.

• A chromosome with two identical strands of DNA is formed.

• Messenger RNA forms along the exposed DNA bases.

What is crossing over?

• Chromosomes are replaced.

• Genes are deleted.

• Chromosome pairs exchange pieces.

What molecule brings amino acids to the ribosome to assemble protein?

• tRNA

• mRNA

• DNA

• RNA