Unit 4 (DNA/Genetics) Review

Front

What are homologous chromosomes?

Back

Chromosomes that pair up during meiosis, having the same genes at the same loci but possibly different alleles.

Front

What phase of Mitosis do chromosomes line up in the middle?

Back

Metaphase.

Front

Which base pairs with Thymine in DNA?

Back

Adenine.

Front

What is a homozygous recessive genotype?

Back

A genotype with two identical recessive alleles, such as 'dd'.

Front

What is the main purpose of Mitosis?

Back

To create 2 daughter cells that are identical to the parent cell.

Front

Define DNA.

Back

DNA (Deoxyribonucleic Acid) is the molecule that carries the genetic instructions for life.

Front

What is a gene?

Back

A segment of DNA that contains the instructions for building a specific protein.

Front

What is the difference between a dominant and recessive allele?

Back

A dominant allele masks the effect of a recessive allele in a heterozygous genotype.

Front

What is meiosis?

Back

A type of cell division that reduces the chromosome number by half, producing four gametes.

Front

What is a genotype?

Back

The genetic makeup of an organism, represented by the alleles it possesses.