human chromosomes

Question 1

What is a genome?

Answer 1

It is the full set of genetic information that an organism carries on its DNA.

Question 2

Scientists photograph cells in mitosis and cut out the chromosomes from the photos and arrange them in a picture known as a

Answer 2

Karyotypes

Question 3

-Two of the 46 chromosomes in the human genome are known as

Answer 3

SEX CHROMOSOMES (because they determine an individual’s sex.)

Question 4

Females have two copies of the?

Answer 4

XX chromosomes

Question 5

Males have the

Answer 5

One X and one Y chromosome

Question 6

why More than 1200 genes are found on the X chromosome?

Answer 6

Because the X chromosome is big

Question 7

The remaining 44 human chromosomes are known as

Answer 7

Autosomes

Question 8

a gene known as ____ helps determine skin and hair color

Answer 8

MC1R(some of the recessive alleles of the MC1R gene cause red hair,
Dominant alleles for the MC1R gene help produce darker hair color)

Question 9

Karyotypes

Answer 9

shows the complete diploid set of chromosomes grouped together in pairs, arranged in order of decreasing size.

Question 10

explain why is the X chromosome is bigger than the Y chromosome

Answer 10

Because X chromosome is big and it contains more genes than the Y chromosome

Question 11

How many genes are located on the Y chromosome and the X chromosome

Answer 11

Y chromosome:140
X chromosome: More than 1200 genes

Question 12

MC1R for the recessive alleles cause what color for the hair

Answer 12

red

Question 13

MC1R for the dominant allele cause what for the hair

Answer 13

dark hair