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Genetics 1
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Genetics 4
Genetics 5
100

Father of genetics, studied peas

Gregor Mendel

100

A gene that is expressed over recessive

Dominant

100

A random permanent change in an organisms DNA

Mutation

100

The Question: A heterozygous purple-flowered plant ($Pp$) is crossed with a homozygous recessive white-flowered plant ($pp$). What percentage of the offspring is expected to have purple flowers?

  • A) 25%

  • B) 50%

  • C) 75%

  • D) 100%

B. 50 %

100

Scientist who proposed the idea of natural selection

Charles Darwin

200

Building blocks of Proteins

Amino Acid

200

Reproduction where offspring are different to the parents

Sexual reproduction

200

The physical trait/appearance of an organism

Phenotype

200

Where are chromosomes located

In the cell nucleus

200

The two letter code describing an organisms genes

Genotype

300

Alternative versions of a gene

Allele

300

Organism with two of the same genes

Homozygous

300

Pairing of homologous chromosomes

Synapsis

300

Meiosis produces...

4 unique daughter cells

300

A gene that is covered up when a dominant gene is present

Recessive

400

Two different genes for the same trait

Heterozygous

400

Pea Plant Practice

Trait: Tall (T) is dominant to short (t).

The Cross: Heterozygous Tall (Tt) times Homozygous Short (tt)

The Question: What percentage of the offspring will be short?

  • A) 25%

  • B) 50%

  • C) 75%

  • D) 100%

 B. 50 %

400

DNA stands for what and is a type of what?

deoxyribonucleic acid 

molecule

400

Genetics: The Dihybrid Cross

Context: In a species of rabbits, Black fur ($B$) is dominant to brown fur ($b$), and Short hair ($S$) is dominant to long hair ($s$).

The Question: If two rabbits that are heterozygous for both traits ($BbSs$) are crossed, what is the probability that an offspring will have brown fur and long hair?

  • A) 1/16

  • B) 3/16

  • C) 9/16

  • D) 4/16

A. 1/16

400
View the diagram drawn by your teacher on the whiteboard. What stage of Meiosis is shown.

Metaphase I

500

Building block of carbohydrates

glucose

500

What are two main roles of mitosis?

Growth and Repair 

500

Mitosis produces...

2 identical daughter cells

500

Exchange of genetic material of homologous chromosomes

Crossing over
500

The Question: If a human skin cell contains 46 chromosomes, how many chromosomes are found in a human sperm or egg cell?

  • A) 46

  • B) 92

  • C) 23

  • D) 22

C. 23