Human Genetics

Question 1

The genetic difference between individuals

Accepted Answer

Genetic Variation

Question 2

How many sperm does it need to fertilize an egg?

Accepted Answer

100 million

Question 3

Long strings of genetic materials known as deoxyribonucleic acid

Accepted Answer

Chromosomes

Question 4

It is a helix-shaped molecule made up of nucleotide base pairs.

Accepted Answer

Deoxyribonucleic acid

Accepted Answer

DNA

Question 5

How many chromosomes does an egg and sperm contains?

Accepted Answer

23

Question 6

The actual carrier of hereditary traits that control or partially control a number of visible characteristics, known as traits, such as eye color, hair color, and so on.

Accepted Answer

Genes

Question 7

a specific version of a gene.

Accepted Answer

Allele

Question 8

A person's ________ is the genetic makeup of that individual.

Accepted Answer

Genotype

Question 9

refers to the individual's inherited physical characteristics, which are a combination of genetic and environmental influences.

Accepted Answer

Phenotype

Question 10

When someone has two copies of the same allele, they are said to be ________ for that allele.

Accepted Answer

Homozygous

Question 11

When someone has a combination of alleles for a given gene, they are said to be __________.

Accepted Answer

Heterozygous

Question 12

Two types of allele

Accepted Answer

Dominant and Recessive

Question 13

a tool used to predict how genes will interact in the production of offspring.

Accepted Answer

Punnett square

Question 14

Developmental psychologists seek to
learn the causes of ________

Accepted Answer

developmental abnormalities

Question 15

Prenatal Stage: Week 1-2

Accepted Answer

0

Question 16

Prenatal Stage: week 3-8

Accepted Answer

1

Question 17

Prenatal Stage: week 9-40

Accepted Answer

2

Question 18

occurs when sperm fertilizes an egg and forms a zygote

Accepted Answer

Conception

Question 19

begins as a one-cell structure that is created when a sperm and egg merge. The genetic makeup and sex of the baby are set at this point.

Accepted Answer

Zygote

Question 20

It is a fragile process, and fewer than one-half, of all zygotes survive beyond the first two weeks.

Accepted Answer

Mitosis