Lecture 10 Practice

Select all true statements about genes.

• Genes are randomly positioned along chromosomes.

• The location of a gene is called a locus.

• In prokaryotes, chromosomes are contained within the nucleus.

• Genes are made up of carbohydrates and proteins.

• Genes are made up of nucleic acids.

Tags

NGSS.HS-LS3-1

True or False: Theoretical inheritance patterns usually exactly match the observed patterns.

• True

• False

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NGSS.HS-LS3-3

The type of cell division that produces haploid gametes and allows for the trading of chromosomes and of genes in homologous chromosomes is called ________.

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NGSS.HS-LS3-2

Select all factors that can affect the observed patterns of inheritance.

• Recombination

• Linkage

• Incomplete Dominance

• Multi-locus traits

• Selection

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Genes that may or may not influence the same trait(s) may be inherited together because of the close proximity of their positions on a chromosome. This is called ______.

Tags

NGSS.HS-LS3-1

A chemical or physical substance that causes mutations is called a _______

Tags

NGSS.HS-LS3-2

Select all true statements about plants and mutagens.

• Exposing crop species to x-rays and gamma rays led to atomic gardening after WWII.

• Seeds have been sent to space to be exposed to a broader spectrum of radiation and environmental extremes.

• EMS is a chemical mutagen that changes an A:T pair to a C:G pair

• EMS is harmless to other organisms

• We are able to induce the exact mutations we want using mutagens with 100% efficiecy.

Tags

NGSS.HS-LS3-2

A plant as the following genotype:

Rr, Tt

where the "R" locus controls color, and the "T" locus control height.

R = red, r = white, T = tall, t = short.

Use this information to select all correct statements.

• The phenotype of this plant is red and short.

• The phenotype of this plant is white and tall.

• This plant is a heterozygote.

• This plant is homozygous dominant.

• The phenotype of this plant is red and tall.

Select all true statements about marker-assisted selection (MAS).

• Markers are used as an indirect way of tracking a plant's genotype.

• It can be helpful when directly tracking or isolating the trait of interest is difficult or expensive.

• Only DNA-based markers are available to use.

• MAS can be used to reduce the duration and cost of plant breeding programs

• Markers are likely to be closely-associated with the gene(s) that control the trait of interest

True or False: Only humans can genetically modify an organism.

• True

• False