Genetics/Meiosis

Characteristics passed down from generation to generation are known as

• traits

• genes

• gametes

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NGSS.HS-LS3-2

NGSS.HS-LS3-1

Homozygous recessive

• MM

• Mm

• mm

• mM

A segment of DNA that codes for a trait is known as

• trait

• gene

• allele

• genotype

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NGSS.HS-LS3-1

A variation of a gene is

• gene

• genotype

• trait

• allele

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NGSS.HS-LS3-2

Trisomy 21 (Down's Syndrome), results from an error during meiosis in which the chromosomes don't separate properly. The result is 3 chromosomes on #21 instead of 2. What is the name of this failure of chromosomes to separate properly?

• Cytokinesis

• Nondisjunction

• cancer

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NGSS.HS-LS3-2

If a homozygous dominant black lab breeds with a homozygous recessive yellow lab what would you expect the litter of 8 offspring to be?

• 4 black, 4 yellow

• 8 multi-colored

• 8 black

• 8 white

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NGSS.HS-LS3-2

NGSS.HS-LS3-1

Meiosis is

• the process of cell division that produces gametes

• the uniting of male and female gametes

Match the following

• cell division that produces gametes

• egg

• Uniting of male & female gametes

• fertizilition

• haploid male sex cell product of meiosis

• zygote

• haploid female sex cell product meiosis

• Meiosis

• Product of male & female gametes uniting

• sperm

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NGSS.HS-LS3-2

At the end of meiosis ____ cells have formed and are called _____.

• two, diploid

• four, diploid

• two, haploid

• four, haploid

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NGSS.HS-LS3-2

What scientist was the first to explain how characteristics are passed from parents to offspring?

• Gregor Mendel

• Charles Darwin

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NGSS.HS-LS3-1