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Heredity/Genetics practice

Total questions: 19

Worksheet time: 10mins

Name
Class
Date
1.

Which of these genotypes is heterozygous?

a)

HH

b)

Hh

c)

hh

2.

Which of these genotypes is homozygous?

a)

ST

b)

Ss

c)

ss

3.

True or False?

There are two alleles for each trait?

a)

True

b)

False

4.

Fill in the blank with the correct word.


In ________-_________________ pollen from a plant fertilizes the same plant

a)

cross-pollination

b)

Self-pollination

c)

Gregor-Mendel

5.

(a)   is the study of heredity

6.

Red (R) is dominant over pink(r). What is the homozygous genotype for red flower?

(a)  

7.

One version of a gene that codes for a characteristic. It can be dominant or recessive

a)

Gene

b)

Allele

c)

recessive

8.

The trait observed when only one type of allele is present. The trait that masks the recessive allele.

a)

Heredity

b)

Allele

c)

dominant

9.

___________________ is a section of DNA that has instructions for an inherited trait

a)

allele

b)

gene

c)

dominant

10.

___________________is the name for the pair of inherited alleles for a gene which we represent using two letters (AA or Aa or aa)

a)

phenotype

b)

gene

c)

genotype

11.

___________________is the physical characteristic because of their genotype.

a)

phenotype

b)

gene

c)

genotype

12.

Check off those that represent a homozygous genotype

a)

BB

b)

Bb

c)

bb

d)

TR

13.

Check off those that represent a heterozygous genotype

a)

BB

b)

Bb

c)

bb

d)

Tt

14.

If you have XX chromosomes you are a ____________

a)

Male

b)

Female

15.

If you have XY chromosomes you are a ____________

a)

Male

b)

Female

16.

Which type of cell division does this represent?

a)

Mitosis

b)

Meiosis

17.

Which type of cell division does this represent?

a)

Mitosis

b)

Meiosis

18.

Cell division that creates exact copies of the original cells and is used for growth and development is called....

a)

Mitosis

b)

Meiosis

19.

Cell division that creates our gametes (sex cells), which contain ½ the number of chromosomes as our body cells is called....

a)

Mitosis

b)

Meiosis