Genetics - Genotypes and Phenotypes

Genetics - Genotypes and Phenotypes

Multiple Choice

One of the threadlike structures in the nucleus of a cell that contain directions for the cell's activities

• variation
• pedigree
• DNA
• chromosome

Multiple Choice

Dominant alleles are represented by a:

• Male gene
• lowercase letter
• recessive trait
• capital letter

Multiple Choice

T - tall and t = short
In the punnett square below, what belongs in the missing square

• tt
• Tt
• Bb
• TT

Multiple Choice

Look at the picture. The probability that a child will inherit the recessive trait is

• 25%
• 50%
• 75%
• 100%

Multiple Choice

What does a punnet square show us?

• The age of the offspring

• The chance of a genotype (trait) showing up in offspring

• Numbers

• Blue eyes

Multiple Choice

How many boxes would say BB?

• 1
• 2
• 4
• 0

Multiple Choice

What is a phenotype

• The genetic make up (code)
• The physical trait

Multiple Choice

What percent of offspring will have the recessive trait?

• 25
• 50
• 75
• 100

Multiple Choice

A ________________________ is used to predict the possible genotype from certain parents

• Mendel Grid
• Genetic Tic Tac Toe
• Punnett Square
• Pedigree Plot

Multiple Choice

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

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

Multiple Choice

If B = brown hair and b = blonde hair, what is the probability of brown hair?

• 25%
• 50%
• 0%
• 75%

Multiple Choice

What allele combination should go in the missing box?

• AA
• Aa
• aa
• none of these

Homozygous vs Heterozygous

• Homozygous = Both the same whether dominant or recessive (BB, CC, FF ect would be called dominant homozygouz, whereas bb, cc ect would be homozygous recessive).

• Heterozygous = Different, these are represented by one capital letter and one lower case e.g (Bb, Cc, Tt ect. Because of the capital these will be dominant).

Multiple Choice

Which of the following is homozygous recessive?

• rr
• AA
• TT
• Ff

Multiple Choice

Which of the following is heterozygous

• FF
• tt
• Gg
• RR

Multiple Choice

Which of these is Homozygous (same as..)

• BB

• Bb

• Bc

Multiple Select

Tick all Homozygous genetypes?

• gg

• Bb

• CC

• TT

Multiple Select

Tick all heterozygous genetypes?

• BB

• CC

• Tt

• Bb

Multiple Choice

Alternative forms of a gene are called

• Alleles
• Homozygous
• DNA
• Genetics

Multiple Choice

An example of a homozygous recessive gene is

• Dd

• DD

• dd

• DAB

Multiple Choice

In a heterozygous genotype, the ___________ allele takes over in the phenotype.

• recessive
• dominant
• lower case letter
• both 

Multiple Choice

Which of the following genotypes is homozygous dominant?

• A
• Aa
• AA
• aa