Genetics

The man who studied genetics and came up with genetics is

• James Watson
• Francis Crick
• Gregor Mendel
• Charles Darwin

Two heterozygous (Tt) tall pea plants are crossed. Which describes their offspring?

• 50% tall and 50% short
• 75% tall and 25% short
• 100% short
• 25% tall and 75% short

What is the Punnett square used to predict?

• possible genotypes for the cross
• which traits are dominant
• which traits are recessive
• the number of offspring

How many alleles does someone have for a genotype?

• 1
• 2
• 3
• 4

In a Punnett square each box represents a(n)....

• offspring
• parent
• gene
• trait

G = green, g = yellow
The genotype for a yellow plant is...

• GG
• Gg
• gg
• all of the choices result in yellow

Tags

NGSS.HS-LS3-1

An offspring will receive how many alleles from each parent to determine a specific trait?

• one
• two
• three
• five

A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?

• 100% BB
• 75% BB and 25% Bb
• 50% BB and 50% Bb
• 50% Bb and 50% bb

Having two of the same genes for the trait (sometimes called purebred).

• homozygous
• hetrozygous
• phenotype
• gene

Genotype refers to the ...

• physical expression of the genes
• the possible combination of alleles in a gene
• whether an allele is dominant or recessive
• how an organism will appear