Bioligy B1

Flashcards for the Biology B1 topic.

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How many chromosones do humans have?

23 pairs, 46 total.

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Name some structural proteins.

  • Skin.
  • Hair.
  • Blood.
  • Cytoplasm in our cells.
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What's the genotype?

The actual gene (e.g. Aa).

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What's the phenotype?

The characteristic the gene creates (e.g. blue eyes).

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Why do children not look like their parents?

Because they will have a combination of both their parents genes and therefore a combination of their characteristics.

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What are alleles?

Different versions of the same gene (e.g. A or a).

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What are the male sex chromosomes?


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What are the female sex chromosomes?


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What are homozygous alleles?

Two alleles which are the same (e.g. AA).

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What are heterozegous alleles?

Two alleles which are different (e.g. Aa).

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Which characteristic will be shown if there are on

Dominant allele's characteristic.

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Which characteristic will be shown if there are tw

Recessive allele's characteristic.

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How many chromosomes do sex cells contain?

23 single chromosones, one from each human pair.

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What is a false positive?

When something is negative/false but thought to be positive/true.

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What is a false negative?

When something is positive/true but thought to be negative/false.

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What is asexual repdoduction?

Non-sexual reproduction.

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What does reproducing asexually create?


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How does bacteria reproduce asexually?

It divides into two parts.

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Name a plant that can asexually reproduce.

A strawberry plant.

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Out of Huntington's disease and Cystic Fibrosis, w

Cystic Fibrosis.

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What are the symptoms of Cystic Fibrosis?

  • Thick sticky mucus in air passages, gut and pancreas.
  • Breathing difficulty.
  • Chest infections.
  • Difficulty in digesting food.
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What are the symptoms of Huntington's disease?

  • Memory loss.
  • Clumsiness.
  • Mood swings.
  • Lack of concentration.
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