Unit 5 1/29/2025

Question 1

What can influence gene expression and lead to phenotypic plasticity?

Answer 1

Various environmental factors

Phenotypic plasticity refers to the ability of an organism to change its phenotype in response to environmental conditions.

Question 2

What phenomenon occurs when individuals with the same genotype exhibit different phenotypes?

Answer 2

Phenotypic plasticity

This phenomenon highlights the role of environmental conditions in shaping physical traits.

Question 3

Some genetic diseases can be linked to ___ or ____ or____

Answer 3

Affected
Mutated alleles
Chromosomal changes

Question 4

Mutated alleles are usually ____

Answer 4

Autosomal recessive

Question 5

What can mutations that occur in gametes lead to?

Answer 5

Genetic disease

These mutations can be passed down to offspring.

Question 6

True or False: Only mutations found in somatic cells can be passed on to offspring.

Answer 6

False

Only mutations found in gamete cells can be passed on.

Question 7

Why are chromosomal mutations considered very severe?

Answer 7

They affect entire sections of genes or entire chromosomes

This can lead to significant genetic disorders.

Question 8

Fill in the blank: Chromosomal mutations are ______ because they affect entire sections of genes or entire chromosomes.

Answer 8

VERY SEVERE

Question 9

What are the five types of chromosomal mutations caused by mistakes during crossing over?

Answer 9

Deletion
Duplication
Inversion
Translocation
Insertion

DID IT

Question 10

What is deletion?

Answer 10

Question 11

What is duplication?

Answer 11

Question 12

What is inversion?

Answer 12

Question 13

Deletion, duplication, and inversion are all examples of ___ chromosome mutations

Answer 13

Single

Question 14

What’s insertion?

Answer 14

Question 15

What’s translocation?

Answer 15

Question 16

What’s nondisjunction and what does it result in?

Answer 16

Question 17

How can you diagnose a genetic diseases?

Answer 17

By looking at the persons karyotypes

Question 18

Fertilization involving gametes that formed as a result of nondisjunction leads to severe genetic diseases such as ____ and ____

Answer 18

Trisomy (having three of the same chromosome)
Monosomy (having only one of a chromosome)

Question 19

What number karyotypes does Trisomy occur in most commonly?

Answer 19

21,18, and 13 because the offspring will actually survive and be able to live despite their issues. (Most common is 21)

Question 20

True or false: the only combination of X and Y sex chromosomes is XX and XY

Answer 20

False there are also in between like XXY OR XYY