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Flashcards in Genetics Deck (50):
1

Asexual reproduction

Reproduction that requires only one parent, mitosis only

2

Chromosome

Long pieces of DNA found in the nucleus of eukaryotic cells

3

Dihybrid

Identically heterozygous at two loci for example RRYy

4

Diploid

A set of chromosomes containing both members of each chromosome pair

5

Egg

Female gamete with one copy of each chromosome

6

Embryo

Early stages of growth and differentiation characterized by rapid cell division and the formation of organ systems

7

Fertilization

Make and female gamete fuses

8

Gene

Segment of DNA that codes for a particular trait

9

Genotype

Makeup of organism, letters

10

Haploid

Set of chromosome containing only one member of each chromosome pair

11

Sexual reproduction

Reproduction that requires two parents

12

Sperm

Male gamete with one copy of each chromosome

13

One step in a single eukaryotic cell becoming two daughter cells is the process of

Mitosis

14

Law of independent assortment

Genes segregate without influence on each other's inheritance

15

How does gamete relate to body cell

Body cell has double the chromosomes
Gametes hold half as many as body cells

16

During the formation of gametes independent assortment occurs

Between homologous

17

Mendes hypothesis that two factors for each trait are segregated during the formation of gametes is explained by

Separation of homologous chromosomes during meiosis

18

Law of independent assortment

Gene pairs sort randomly and independently of each other

19

The law of segregation states

Alleles of a gene separate from each other during meiosis

20

To describe how traits can disappear and reappear in a certain pattern from generation to generation Mendel proposed

The law of independent assortment

21

One of the plants that the scientists is studying has an extra copy of one chromosome in all its cells, this variation most likely occurred during

Meiosis

22

Crossing over commonly results inn

New combinations of genes

23

For tests always cross with

Homo Recessive

24

The genetic makeup of an organism is called its

Genotype

25

Living things grow because

Organisms produce more and more cells by mitosis

26

How are mature human sperm and egg similar

Same number of chromosome in the nuclei

27

Female gametes at called

Eggs

28

Each egg and Sperm cell contains a haploid number of chromosomes, after fertilization a zygote is formed with a blank number of chromosomes

Diploid number

29

How many chromosomes are in a human gamete

23

30

A human zygote contains how many chromosomes

46

31

Sex cells are also called

Gametes

32

If father has mutation and every Daughter does but no sons what type of mutation is not possible

Y linked

33

No disjunction is related to human disorder, how

Alters chromosome numbers

34

What occurs during the process of meiosis in humans that can lead to a child with the condition of Down syndrome

Production of gametes with one duplicate chromosome, no disjunction of chromosome 21 during meiosis

35

In which situation are the phenotype a of f2 offspring expected to follow the 9:3:3:1 ratio

Dihybrid cross for two unlinked traits

36

Which stage of meiosis is responsible for the law of independent assortment

Metaphase one

37

Synapsids

Forming tetrad

38

Crossing over happens where

Prophase one

39

Inn complete dominance

Neither alleles dominant, blending

40

Co dominance

Dominant form of each are evident, spots, blood

41

Hybrid

Hetero

42

Purebred

Homo

43

True breeding

Homo

44

Dihybrid solving

Foil

45

Circle with dot (pedigree)

X linked

46

If most of the males in the pedigree are affected the disorder is

X linked

47

If the ratio of fifty fifty then the disorder is

Autosomal

48

If it is recessive

Neither parents have it

49

If it is dominant

Parent must have it

50

Allele

An alternate form of a gene for one trait